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SEAN CARROLL
I'm interested in how the world works at the deepest levels, which leads me to do research in physics and philosophy. My current interests include foundational questions in quantum mechanics, spacetime, statistical mechanics, complexity, and cosmology, with occasional dabblings elsewhere. SEAN CARROLL’S MINDSCAPE PODCAST Sean Carroll hosts conversations with the world's most interesting thinkers. Science, society, philosophy, culture, arts, and ideas.SEAN CARROLL
Conservation of energy is a somewhat sacred principle in physics, though it can be tricky in certain circumstances, such as an expanding universe.Quantum mechanics is another context in which energy conservation is a subtle thing — so much so that it’s still worth writing papers about, which Jackie Lodman and I recently did.In this blog post I’d like to explain two things: LECTURE NOTES ON GENERAL RELATIVITY This set of lecture notes on general relativity has been expanded into a textbook, Spacetime and Geometry: An Introduction to General Relativity, available for purchase online or at finer bookstores everywhere.About 50% of the book is completely new; I've also polished and improved many of the explanations, and made the organization more flexible and user-friendly. BIGGEST IDEAS IN THE UNIVERSE We’re well into the Biggest Ideas in the Universe series, and some people have been asking how I make the actual videos. I explained the basic process in the Q&A video for Force, Energy, and Action – embedded below – but it turns out that not everyone watches every single video from start to finish (weird, I know), and besides the details have changed a little bit. QUANTUM MECHANICS III (PHYSICS 125C) Quantum Mechanics III (Physics 125c) Sean Carroll, Physics Department, Caltech Spring quarter, 2017. Artist's impression of entangled particles, from YouTube/stargazer via Business Insider. Announcements. Final exam for seniors and graduate students will be available at noonon
144 | SOLO: ARE WE MOVING BEYOND THE STANDARD MODEL Click above to close. 0:00:00.7 Sean Carroll: Hello, everybody, welcome to the Mindscape podcast. I’m your host, Sean Carroll. And a few weeks ago, I’m recording this in April 2021, we had not one, but two different reports of completely independent anomalies in particle physics, that is to say apparent disagreements between the theoretical predictions based on the standard model ofTHE FLOW OF TIME
@Matti Pitkanen. Biology and consciousness is something with which the text book physics cannot cope with. What’s the basis of this claim? And you should probably read Sean’s “The Laws Underlying The Physics of Everyday Life Are Completely Understood” Part 1, Part 2, and Part 3 before you answer this question. Your argument appears to be “in the past people thought they knew some CORE THEORY T-SHIRTS Way back when, for purposes of giving a talk, I made a figure that displayed the world of everyday experience in one equation.The label reflects the fact that the laws of physics underlying everyday life are completely understood.. So now there are T-shirts. (See below topurchase your own.)
1 THE MACH-ZEHNDER INTERFEROMETER gure, the unitary U p describing each of the two (identical) beamsplitters and the unitary U p describing the phase shifter are given by U b= 1 p 2 (j0i+ j1i)h0j+ 1 p 2 (j0ij 1i)h1j (1) U p= j0ih0j+ ei˚j1ih1j: (2) The photodetectors make a measurement of how the photon exited the interferometer, andSEAN CARROLL
I'm interested in how the world works at the deepest levels, which leads me to do research in physics and philosophy. My current interests include foundational questions in quantum mechanics, spacetime, statistical mechanics, complexity, and cosmology, with occasional dabblings elsewhere. SEAN CARROLL’S MINDSCAPE PODCAST Sean Carroll hosts conversations with the world's most interesting thinkers. Science, society, philosophy, culture, arts, and ideas.SEAN CARROLL
Conservation of energy is a somewhat sacred principle in physics, though it can be tricky in certain circumstances, such as an expanding universe.Quantum mechanics is another context in which energy conservation is a subtle thing — so much so that it’s still worth writing papers about, which Jackie Lodman and I recently did.In this blog post I’d like to explain two things: LECTURE NOTES ON GENERAL RELATIVITY This set of lecture notes on general relativity has been expanded into a textbook, Spacetime and Geometry: An Introduction to General Relativity, available for purchase online or at finer bookstores everywhere.About 50% of the book is completely new; I've also polished and improved many of the explanations, and made the organization more flexible and user-friendly. BIGGEST IDEAS IN THE UNIVERSE We’re well into the Biggest Ideas in the Universe series, and some people have been asking how I make the actual videos. I explained the basic process in the Q&A video for Force, Energy, and Action – embedded below – but it turns out that not everyone watches every single video from start to finish (weird, I know), and besides the details have changed a little bit. QUANTUM MECHANICS III (PHYSICS 125C) Quantum Mechanics III (Physics 125c) Sean Carroll, Physics Department, Caltech Spring quarter, 2017. Artist's impression of entangled particles, from YouTube/stargazer via Business Insider. Announcements. Final exam for seniors and graduate students will be available at noonon
144 | SOLO: ARE WE MOVING BEYOND THE STANDARD MODEL Click above to close. 0:00:00.7 Sean Carroll: Hello, everybody, welcome to the Mindscape podcast. I’m your host, Sean Carroll. And a few weeks ago, I’m recording this in April 2021, we had not one, but two different reports of completely independent anomalies in particle physics, that is to say apparent disagreements between the theoretical predictions based on the standard model ofTHE FLOW OF TIME
@Matti Pitkanen. Biology and consciousness is something with which the text book physics cannot cope with. What’s the basis of this claim? And you should probably read Sean’s “The Laws Underlying The Physics of Everyday Life Are Completely Understood” Part 1, Part 2, and Part 3 before you answer this question. Your argument appears to be “in the past people thought they knew some CORE THEORY T-SHIRTS Way back when, for purposes of giving a talk, I made a figure that displayed the world of everyday experience in one equation.The label reflects the fact that the laws of physics underlying everyday life are completely understood.. So now there are T-shirts. (See below topurchase your own.)
1 THE MACH-ZEHNDER INTERFEROMETER gure, the unitary U p describing each of the two (identical) beamsplitters and the unitary U p describing the phase shifter are given by U b= 1 p 2 (j0i+ j1i)h0j+ 1 p 2 (j0ij 1i)h1j (1) U p= j0ih0j+ ei˚j1ih1j: (2) The photodetectors make a measurement of how the photon exited the interferometer, andAMA | JUNE 2021
Welcome to the June 2021 Ask Me Anything episode of Mindscape! These monthly excursions are funded by Patreon supporters (who are also the ones asking the questions). I take the large number of questions asked by Patreons, whittle them down to a more manageable size — based primarily on whether I have anything interesting to say about them, not whether the questions JUNE 2021 – SEAN CARROLL Patreon for recurring donations. Patreon supporters can listen to episodes ad-free, and get monthly Ask Me Anything episodes. One-time donations are also possible via Paypal, though unfortunately no tangible benefits accrue.SEAN CARROLL
Conservation of energy is a somewhat sacred principle in physics, though it can be tricky in certain circumstances, such as an expanding universe.Quantum mechanics is another context in which energy conservation is a subtle thing — so much so that it’s still worth writing papers about, which Jackie Lodman and I recently did.In this blog post I’d like to explain two things: 150 | SIMON DEDEO ON HOW EXPLANATIONS WORK AND WHY THEY Click above to close. 0:00:00.1 Sean Carroll: Hello, everyone. Welcome to the Mindscape Podcast. I’m your host, Sean Carroll. Obviously, on a podcast like mine, we’re often going to be talking to scientists of various sorts, theoretical scientists in particular, some of my favorites, not all of them. 144 | SOLO: ARE WE MOVING BEYOND THE STANDARD MODEL Click above to close. 0:00:00.7 Sean Carroll: Hello, everybody, welcome to the Mindscape podcast. I’m your host, Sean Carroll. And a few weeks ago, I’m recording this in April 2021, we had not one, but two different reports of completely independent anomalies in particle physics, that is to say apparent disagreements between the theoretical predictions based on the standard model of THE BIGGEST IDEAS IN THE UNIVERSE Thanks for this Sean. If the Wave function is a contentious function (as the bell curve looking curve Shaun showed in the example) spread out over space and if a measurement can find the particle at any one of those points – then in many worlds interpretation it means that the universe will have to split into infinite branches for every possibility not only two branches.SEAN CARROLL
Will Baude at Crescat Sententia asks two profound questions that we at Preposterous are happy to answer.. First: What is the appropriate honorific for a professor at the University of Chicago? There’s a story one sometimes hears to the effect that everyone (students, faculty, presumably researchers) at the UofC refers to each other by Mr/Ms, in sort of a charming reverse-snobbery. WHAT HAPPENED AT THE BIG BANG? How can one “remain optimistic that we are actually making progress here” and be “pretty hopeful that within lifetime we’ll have settled on a leading theory for what happened at the very beginning of the universe” when there’s zero chance of ever putting the related theoretical conclusions to an observational test? HOW MUCH COSMIC INFLATION PROBABLY OCCURRED? Think for a moment about how much inflation can occur (rather than “probably does”) in these models. Remember that the inflaton field acts just like a ball rolling down a hill, except that there is an effective “friction” from the expansion of the universe. IS THERE LIFE AFTER DEATH? A DEBATE This is an Intelligence Squared debate, which is a series of Oxford-style formal debates that are held around the world, often with quite impressive participants. Four people, two on each side of a resolution. Seven-minute opening statements, round-tableSEAN CARROLL
Sean Carroll – Preposterous Universe. I'm interested in how the world works at the deepest levels, which leads me to do research in physics and philosophy. My current interests include foundational questions in quantum mechanics, spacetime, statistical mechanics, complexity, and cosmology, with occasional dabblings elsewhere. SEAN CARROLL’S MINDSCAPE PODCAST Sean Carroll's Mindscape Podcast. Sean Carroll hosts conversations with the world's most interesting thinkers. Science, society, philosophy, culture, arts, and ideas. LECTURE NOTES ON GENERAL RELATIVITY This set of lecture notes on general relativity has been expanded into a textbook, Spacetime and Geometry: An Introduction to General Relativity, available for purchase online or at finer bookstores everywhere.About 50% of the book is completely new; I've also polished and improved many of the explanations, and made the organization more flexible and user-friendly. BIGGEST IDEAS IN THE UNIVERSE One such is the idea of a “critical” system, balanced at a point where there is interesting dynamics at all scales. We know a lot about such systems, without approaching anything like a complete understanding just yet. The Biggest Ideas in the Universe | 23. Criticality and Complexity. QUANTUM MECHANICS III (PHYSICS 125C) Quantum Mechanics III (Physics 125c) Sean Carroll, Physics Department, Caltech Spring quarter, 2017. Artist's impression of entangled particles, from YouTube/stargazer via Business Insider. Announcements. Final exam for seniors and graduate students will be available at noonon
POETIC NATURALISM
Summary. Naturalism is a philosophy according to which there is only one world -- the natural world, which exhibits unbroken patterns (the laws of nature), and which we can learn about through hypothesis testing and observation. In particular, there is no supernatural world -- no gods, no spirits, no transcendent meanings. I like to talk about a particular approach to naturalism, which can be DOES THE UNIVERSE NEED GOD? 144 | SOLO: ARE WE MOVING BEYOND THE STANDARD MODEL 1:08:38.5 SC: We’re allowed to be a little bit hopeful to say, maybe this is it, maybe this is the time that we go beyond the standard model, the first truly new surprising result that was completely unexpected in a particle physics experiment since the 1970s, a particle physics experiment here on Earth. 148 | HENRY FARRELL ON DEMOCRACY AS A PROBLEM-SOLVING David Graeber’s “Debt: the first five thousand years” would be a useful contributor of context for this discussion. The rise of states and markets together, during the Axial Age empires, created the definition of “self- interest” that is common among economists ( and hence many others) to this day. 141 | ZEYNEP TUFEKCI ON INFORMATION AND ATTENTION IN A Support Mindscape on Patreon.. Zeynep Tufekci received a Ph.D. in sociology from the University of Texas-Austin. She is currently an Associate Professor in the School of Information and Library Science at the University of North Carolina, Chapel Hill, and will be a Visiting Professor at the Craig Newmark Center for Journalism Ethics and Security at Columbia University.SEAN CARROLL
Sean Carroll – Preposterous Universe. I'm interested in how the world works at the deepest levels, which leads me to do research in physics and philosophy. My current interests include foundational questions in quantum mechanics, spacetime, statistical mechanics, complexity, and cosmology, with occasional dabblings elsewhere. SEAN CARROLL’S MINDSCAPE PODCAST Sean Carroll's Mindscape Podcast. Sean Carroll hosts conversations with the world's most interesting thinkers. Science, society, philosophy, culture, arts, and ideas. LECTURE NOTES ON GENERAL RELATIVITY This set of lecture notes on general relativity has been expanded into a textbook, Spacetime and Geometry: An Introduction to General Relativity, available for purchase online or at finer bookstores everywhere.About 50% of the book is completely new; I've also polished and improved many of the explanations, and made the organization more flexible and user-friendly. BIGGEST IDEAS IN THE UNIVERSE One such is the idea of a “critical” system, balanced at a point where there is interesting dynamics at all scales. We know a lot about such systems, without approaching anything like a complete understanding just yet. The Biggest Ideas in the Universe | 23. Criticality and Complexity. QUANTUM MECHANICS III (PHYSICS 125C) Quantum Mechanics III (Physics 125c) Sean Carroll, Physics Department, Caltech Spring quarter, 2017. Artist's impression of entangled particles, from YouTube/stargazer via Business Insider. Announcements. Final exam for seniors and graduate students will be available at noonon
POETIC NATURALISM
Summary. Naturalism is a philosophy according to which there is only one world -- the natural world, which exhibits unbroken patterns (the laws of nature), and which we can learn about through hypothesis testing and observation. In particular, there is no supernatural world -- no gods, no spirits, no transcendent meanings. I like to talk about a particular approach to naturalism, which can be DOES THE UNIVERSE NEED GOD? 144 | SOLO: ARE WE MOVING BEYOND THE STANDARD MODEL 1:08:38.5 SC: We’re allowed to be a little bit hopeful to say, maybe this is it, maybe this is the time that we go beyond the standard model, the first truly new surprising result that was completely unexpected in a particle physics experiment since the 1970s, a particle physics experiment here on Earth. 148 | HENRY FARRELL ON DEMOCRACY AS A PROBLEM-SOLVING David Graeber’s “Debt: the first five thousand years” would be a useful contributor of context for this discussion. The rise of states and markets together, during the Axial Age empires, created the definition of “self- interest” that is common among economists ( and hence many others) to this day. 141 | ZEYNEP TUFEKCI ON INFORMATION AND ATTENTION IN A Support Mindscape on Patreon.. Zeynep Tufekci received a Ph.D. in sociology from the University of Texas-Austin. She is currently an Associate Professor in the School of Information and Library Science at the University of North Carolina, Chapel Hill, and will be a Visiting Professor at the Craig Newmark Center for Journalism Ethics and Security at Columbia University.AMA | JUNE 2021
Welcome to the June 2021 Ask Me Anything episode of Mindscape! These monthly excursions are funded by Patreon supporters (who are also the ones asking the questions). I take the large number of questions asked by Patreons, whittle them down to a more manageable size — based primarily on whether I have anything interesting to say about them, not whether the questionsBOOKS & COURSES
Main Menu. About Menu Toggle. About Sean; CV; Research Menu Toggle. Research; Annotated Publications; Podcast; Activities JUNE 2021 – SEAN CARROLL Patreon for recurring donations. Patreon supporters can listen to episodes ad-free, and get monthly Ask Me Anything episodes. One-time donations are also possible via Paypal, though unfortunately no tangible benefits accrue.SEAN CARROLL
Conservation of energy is a somewhat sacred principle in physics, though it can be tricky in certain circumstances, such as an expanding universe.Quantum mechanics is another context in which energy conservation is a subtle thing — so much so that it’s still worth writing papers about, which Jackie Lodman and I recently did.In this blog post I’d like to explain two things:THE BIG PICTURE
The Big Picture is an unprecedented scientific worldview, a tour de force that will sit on shelves alongside the works of Stephen Hawking, Carl Sagan, Daniel Dennett, and E. O. Wilson for years to come. Sean Carroll is a theoretical physicist at the California Institute of Technology. He received his PhD in 1993 from Harvard University. 150 | SIMON DEDEO ON HOW EXPLANATIONS WORK AND WHY THEY Click above to close. 0:00:00.1 Sean Carroll: Hello, everyone. Welcome to the Mindscape Podcast. I’m your host, Sean Carroll. Obviously, on a podcast like mine, we’re often going to be talking to scientists of various sorts, theoretical scientists in particular, some of my favorites, not all of them. 141 | ZEYNEP TUFEKCI ON INFORMATION AND ATTENTION IN A Zeynep Tufekci is a sociologist who studies the flow of information and its impact on society, especially through social media. She has provided insightful analyses of protest movements, online privacy, and the Covid-19 pandemic. We talk about how technology has been shaping the information space we all inhabit. 87 | KARL FRISTON ON BRAINS, PREDICTIONS, AND FREE ENERGY 87 | Karl Friston on Brains, Predictions, and Free Energy. If you tell me that one of the world’s leading neuroscientists has developed a theory of how the brain works that also has implications for the origin and nature of life more broadly, and uses concepts of entropy and information in a central way — well, you know I’m going to be 148 | HENRY FARRELL ON DEMOCRACY AS A PROBLEM-SOLVING David Graeber’s “Debt: the first five thousand years” would be a useful contributor of context for this discussion. The rise of states and markets together, during the Axial Age empires, created the definition of “self- interest” that is common among economists ( and hence many others) to this day. 131 | AVI LOEB ON TAKING ALIENS SERIOUSLY Astronomer Avi Loeb thinks we should be taking this possibility seriously, so much so that he suggested that the recent interstellar interloper `Oumuamua might be a spaceship built by aliens. That got him in a lot of trouble. We talk about the trouble, about `Oumuamua, and the attitude scientists should take toward provocative ideas.SEAN CARROLL
Sean Carroll – Preposterous Universe. I'm interested in how the world works at the deepest levels, which leads me to do research in physics and philosophy. My current interests include foundational questions in quantum mechanics, spacetime, statistical mechanics, complexity, and cosmology, with occasional dabblings elsewhere. SEAN CARROLL’S MINDSCAPE PODCAST Sean Carroll's Mindscape Podcast. Sean Carroll hosts conversations with the world's most interesting thinkers. Science, society, philosophy, culture, arts, and ideas. LECTURE NOTES ON GENERAL RELATIVITY This set of lecture notes on general relativity has been expanded into a textbook, Spacetime and Geometry: An Introduction to General Relativity, available for purchase online or at finer bookstores everywhere.About 50% of the book is completely new; I've also polished and improved many of the explanations, and made the organization more flexible and user-friendly. BIGGEST IDEAS IN THE UNIVERSE One such is the idea of a “critical” system, balanced at a point where there is interesting dynamics at all scales. We know a lot about such systems, without approaching anything like a complete understanding just yet. The Biggest Ideas in the Universe | 23. Criticality and Complexity. QUANTUM MECHANICS III (PHYSICS 125C) Quantum Mechanics III (Physics 125c) Sean Carroll, Physics Department, Caltech Spring quarter, 2017. Artist's impression of entangled particles, from YouTube/stargazer via Business Insider. Announcements. Final exam for seniors and graduate students will be available at noonon
POETIC NATURALISM
Summary. Naturalism is a philosophy according to which there is only one world -- the natural world, which exhibits unbroken patterns (the laws of nature), and which we can learn about through hypothesis testing and observation. In particular, there is no supernatural world -- no gods, no spirits, no transcendent meanings. I like to talk about a particular approach to naturalism, which can be DOES THE UNIVERSE NEED GOD? 144 | SOLO: ARE WE MOVING BEYOND THE STANDARD MODEL 1:08:38.5 SC: We’re allowed to be a little bit hopeful to say, maybe this is it, maybe this is the time that we go beyond the standard model, the first truly new surprising result that was completely unexpected in a particle physics experiment since the 1970s, a particle physics experiment here on Earth. 148 | HENRY FARRELL ON DEMOCRACY AS A PROBLEM-SOLVING David Graeber’s “Debt: the first five thousand years” would be a useful contributor of context for this discussion. The rise of states and markets together, during the Axial Age empires, created the definition of “self- interest” that is common among economists ( and hence many others) to this day. 141 | ZEYNEP TUFEKCI ON INFORMATION AND ATTENTION IN A Support Mindscape on Patreon.. Zeynep Tufekci received a Ph.D. in sociology from the University of Texas-Austin. She is currently an Associate Professor in the School of Information and Library Science at the University of North Carolina, Chapel Hill, and will be a Visiting Professor at the Craig Newmark Center for Journalism Ethics and Security at Columbia University.SEAN CARROLL
Sean Carroll – Preposterous Universe. I'm interested in how the world works at the deepest levels, which leads me to do research in physics and philosophy. My current interests include foundational questions in quantum mechanics, spacetime, statistical mechanics, complexity, and cosmology, with occasional dabblings elsewhere. SEAN CARROLL’S MINDSCAPE PODCAST Sean Carroll's Mindscape Podcast. Sean Carroll hosts conversations with the world's most interesting thinkers. Science, society, philosophy, culture, arts, and ideas. LECTURE NOTES ON GENERAL RELATIVITY This set of lecture notes on general relativity has been expanded into a textbook, Spacetime and Geometry: An Introduction to General Relativity, available for purchase online or at finer bookstores everywhere.About 50% of the book is completely new; I've also polished and improved many of the explanations, and made the organization more flexible and user-friendly. BIGGEST IDEAS IN THE UNIVERSE One such is the idea of a “critical” system, balanced at a point where there is interesting dynamics at all scales. We know a lot about such systems, without approaching anything like a complete understanding just yet. The Biggest Ideas in the Universe | 23. Criticality and Complexity. QUANTUM MECHANICS III (PHYSICS 125C) Quantum Mechanics III (Physics 125c) Sean Carroll, Physics Department, Caltech Spring quarter, 2017. Artist's impression of entangled particles, from YouTube/stargazer via Business Insider. Announcements. Final exam for seniors and graduate students will be available at noonon
POETIC NATURALISM
Summary. Naturalism is a philosophy according to which there is only one world -- the natural world, which exhibits unbroken patterns (the laws of nature), and which we can learn about through hypothesis testing and observation. In particular, there is no supernatural world -- no gods, no spirits, no transcendent meanings. I like to talk about a particular approach to naturalism, which can be DOES THE UNIVERSE NEED GOD? 144 | SOLO: ARE WE MOVING BEYOND THE STANDARD MODEL 1:08:38.5 SC: We’re allowed to be a little bit hopeful to say, maybe this is it, maybe this is the time that we go beyond the standard model, the first truly new surprising result that was completely unexpected in a particle physics experiment since the 1970s, a particle physics experiment here on Earth. 148 | HENRY FARRELL ON DEMOCRACY AS A PROBLEM-SOLVING David Graeber’s “Debt: the first five thousand years” would be a useful contributor of context for this discussion. The rise of states and markets together, during the Axial Age empires, created the definition of “self- interest” that is common among economists ( and hence many others) to this day. 141 | ZEYNEP TUFEKCI ON INFORMATION AND ATTENTION IN A Support Mindscape on Patreon.. Zeynep Tufekci received a Ph.D. in sociology from the University of Texas-Austin. She is currently an Associate Professor in the School of Information and Library Science at the University of North Carolina, Chapel Hill, and will be a Visiting Professor at the Craig Newmark Center for Journalism Ethics and Security at Columbia University.AMA | JUNE 2021
Welcome to the June 2021 Ask Me Anything episode of Mindscape! These monthly excursions are funded by Patreon supporters (who are also the ones asking the questions). I take the large number of questions asked by Patreons, whittle them down to a more manageable size — based primarily on whether I have anything interesting to say about them, not whether the questionsBOOKS & COURSES
Main Menu. About Menu Toggle. About Sean; CV; Research Menu Toggle. Research; Annotated Publications; Podcast; Activities JUNE 2021 – SEAN CARROLL Patreon for recurring donations. Patreon supporters can listen to episodes ad-free, and get monthly Ask Me Anything episodes. One-time donations are also possible via Paypal, though unfortunately no tangible benefits accrue.SEAN CARROLL
Conservation of energy is a somewhat sacred principle in physics, though it can be tricky in certain circumstances, such as an expanding universe.Quantum mechanics is another context in which energy conservation is a subtle thing — so much so that it’s still worth writing papers about, which Jackie Lodman and I recently did.In this blog post I’d like to explain two things: 150 | SIMON DEDEO ON HOW EXPLANATIONS WORK AND WHY THEY Click above to close. 0:00:00.1 Sean Carroll: Hello, everyone. Welcome to the Mindscape Podcast. I’m your host, Sean Carroll. Obviously, on a podcast like mine, we’re often going to be talking to scientists of various sorts, theoretical scientists in particular, some of my favorites, not all of them. SPACETIME AND GEOMETRY Spacetime and Geometry An Introduction to General Relativity . Spacetime and Geometry is a graduate-level textbook on general relativity.. Notice: Spacetime and Geometry recently changed publishers, from Pearson to Cambridge University Press. It is exactly the same book, just with a different cover.. Buy it: Amazon.com * Cambridge "For if each Star is little more a mathematical Point, 146 | EMILY RIEHL ON TOPOLOGY, CATEGORIES, AND THE FUTURE 146 | Emily Riehl on Topology, Categories, and the Future of Mathematics. “A way that math can make the world a better place is by making it a more interesting place to be a conscious being.”. So says mathematician Emily Riehl near the start of this episode, and it’s a good summary of what’s to come. Emily works in realms oftopology
141 | ZEYNEP TUFEKCI ON INFORMATION AND ATTENTION IN A Support Mindscape on Patreon.. Zeynep Tufekci received a Ph.D. in sociology from the University of Texas-Austin. She is currently an Associate Professor in the School of Information and Library Science at the University of North Carolina, Chapel Hill, and will be a Visiting Professor at the Craig Newmark Center for Journalism Ethics and Security at Columbia University. 87 | KARL FRISTON ON BRAINS, PREDICTIONS, AND FREE ENERGY 87 | Karl Friston on Brains, Predictions, and Free Energy. If you tell me that one of the world’s leading neuroscientists has developed a theory of how the brain works that also has implications for the origin and nature of life more broadly, and uses concepts of entropy and information in a central way — well, you know I’m going to be 131 | AVI LOEB ON TAKING ALIENS SERIOUSLY Astronomer Avi Loeb thinks we should be taking this possibility seriously, so much so that he suggested that the recent interstellar interloper `Oumuamua might be a spaceship built by aliens. That got him in a lot of trouble. We talk about the trouble, about `Oumuamua, and the attitude scientists should take toward provocative ideas.SEAN CARROLL
I'm interested in how the world works at the deepest levels, which leads me to do research in physics and philosophy. My current interests include foundational questions in quantum mechanics, spacetime, statistical mechanics, complexity, and cosmology, with occasional dabblings elsewhere. SEAN CARROLL’S MINDSCAPE PODCAST Sean Carroll hosts conversations with the world's most interesting thinkers. Science, society, philosophy, culture, arts, and ideas. LECTURE NOTES ON GENERAL RELATIVITY This set of lecture notes on general relativity has been expanded into a textbook, Spacetime and Geometry: An Introduction to General Relativity, available for purchase online or at finer bookstores everywhere.About 50% of the book is completely new; I've also polished and improved many of the explanations, and made the organization more flexible and user-friendly. BIGGEST IDEAS IN THE UNIVERSE We’re well into the Biggest Ideas in the Universe series, and some people have been asking how I make the actual videos. I explained the basic process in the Q&A video for Force, Energy, and Action – embedded below – but it turns out that not everyone watches every single video from start to finish (weird, I know), and besides the details have changed a little bit. QUANTUM MECHANICS III (PHYSICS 125C) Quantum Mechanics III (Physics 125c) Sean Carroll, Physics Department, Caltech Spring quarter, 2017. Artist's impression of entangled particles, from YouTube/stargazer via Business Insider. Announcements. Final exam for seniors and graduate students will be available at noonon
POETIC NATURALISM
Summary. Naturalism is a philosophy according to which there is only one world -- the natural world, which exhibits unbroken patterns (the laws of nature), and which we can learn about through hypothesis testing and observation. In particular, there is no supernatural world -- no gods, no spirits, no transcendent meanings. I like to talk about a particular approach to naturalism, which can be 144 | SOLO: ARE WE MOVING BEYOND THE STANDARD MODEL Click above to close. 0:00:00.7 Sean Carroll: Hello, everybody, welcome to the Mindscape podcast. I’m your host, Sean Carroll. And a few weeks ago, I’m recording this in April 2021, we had not one, but two different reports of completely independent anomalies in particle physics, that is to say apparent disagreements between the theoretical predictions based on the standard model of 85 | L.A. PAUL ON TRANSFORMATIVE EXPERIENCES AND OUR It’s hard to make decisions that will change your life. It’s even harder to make a decision if you know that the outcome could change who you are.Our preferences are determined by who we are, and they might be quite different after a decision is made — and there’s norational way of
148 | HENRY FARRELL ON DEMOCRACY AS A PROBLEM-SOLVING David Graeber’s “Debt: the first five thousand years” would be a useful contributor of context for this discussion. The rise of states and markets together, during the Axial Age empires, created the definition of “self- interest” that is common among economists ( and hence many others) to this day. 141 | ZEYNEP TUFEKCI ON INFORMATION AND ATTENTION IN A Support Mindscape on Patreon.. Zeynep Tufekci received a Ph.D. in sociology from the University of Texas-Austin. She is currently an Associate Professor in the School of Information and Library Science at the University of North Carolina, Chapel Hill, and will be a Visiting Professor at the Craig Newmark Center for Journalism Ethics and Security at Columbia University.SEAN CARROLL
I'm interested in how the world works at the deepest levels, which leads me to do research in physics and philosophy. My current interests include foundational questions in quantum mechanics, spacetime, statistical mechanics, complexity, and cosmology, with occasional dabblings elsewhere. SEAN CARROLL’S MINDSCAPE PODCAST Sean Carroll hosts conversations with the world's most interesting thinkers. Science, society, philosophy, culture, arts, and ideas. LECTURE NOTES ON GENERAL RELATIVITY This set of lecture notes on general relativity has been expanded into a textbook, Spacetime and Geometry: An Introduction to General Relativity, available for purchase online or at finer bookstores everywhere.About 50% of the book is completely new; I've also polished and improved many of the explanations, and made the organization more flexible and user-friendly. BIGGEST IDEAS IN THE UNIVERSE We’re well into the Biggest Ideas in the Universe series, and some people have been asking how I make the actual videos. I explained the basic process in the Q&A video for Force, Energy, and Action – embedded below – but it turns out that not everyone watches every single video from start to finish (weird, I know), and besides the details have changed a little bit. QUANTUM MECHANICS III (PHYSICS 125C) Quantum Mechanics III (Physics 125c) Sean Carroll, Physics Department, Caltech Spring quarter, 2017. Artist's impression of entangled particles, from YouTube/stargazer via Business Insider. Announcements. Final exam for seniors and graduate students will be available at noonon
POETIC NATURALISM
Summary. Naturalism is a philosophy according to which there is only one world -- the natural world, which exhibits unbroken patterns (the laws of nature), and which we can learn about through hypothesis testing and observation. In particular, there is no supernatural world -- no gods, no spirits, no transcendent meanings. I like to talk about a particular approach to naturalism, which can be 144 | SOLO: ARE WE MOVING BEYOND THE STANDARD MODEL Click above to close. 0:00:00.7 Sean Carroll: Hello, everybody, welcome to the Mindscape podcast. I’m your host, Sean Carroll. And a few weeks ago, I’m recording this in April 2021, we had not one, but two different reports of completely independent anomalies in particle physics, that is to say apparent disagreements between the theoretical predictions based on the standard model of 148 | HENRY FARRELL ON DEMOCRACY AS A PROBLEM-SOLVING David Graeber’s “Debt: the first five thousand years” would be a useful contributor of context for this discussion. The rise of states and markets together, during the Axial Age empires, created the definition of “self- interest” that is common among economists ( and hence many others) to this day. 85 | L.A. PAUL ON TRANSFORMATIVE EXPERIENCES AND OUR It’s hard to make decisions that will change your life. It’s even harder to make a decision if you know that the outcome could change who you are.Our preferences are determined by who we are, and they might be quite different after a decision is made — and there’s norational way of
141 | ZEYNEP TUFEKCI ON INFORMATION AND ATTENTION IN A Support Mindscape on Patreon.. Zeynep Tufekci received a Ph.D. in sociology from the University of Texas-Austin. She is currently an Associate Professor in the School of Information and Library Science at the University of North Carolina, Chapel Hill, and will be a Visiting Professor at the Craig Newmark Center for Journalism Ethics and Security at Columbia University.AMA | JUNE 2021
Welcome to the June 2021 Ask Me Anything episode of Mindscape! These monthly excursions are funded by Patreon supporters (who are also the ones asking the questions). I take the large number of questions asked by Patreons, whittle them down to a more manageable size — based primarily on whether I have anything interesting to say about them, not whether the questions JUNE 2021 – SEAN CARROLL Patreon for recurring donations. Patreon supporters can listen to episodes ad-free, and get monthly Ask Me Anything episodes. One-time donations are also possible via Paypal, though unfortunately no tangible benefits accrue.SEAN CARROLL
Conservation of energy is a somewhat sacred principle in physics, though it can be tricky in certain circumstances, such as an expanding universe.Quantum mechanics is another context in which energy conservation is a subtle thing — so much so that it’s still worth writing papers about, which Jackie Lodman and I recently did.In this blog post I’d like to explain two things: 150 | SIMON DEDEO ON HOW EXPLANATIONS WORK AND WHY THEY Click above to close. 0:00:00.1 Sean Carroll: Hello, everyone. Welcome to the Mindscape Podcast. I’m your host, Sean Carroll. Obviously, on a podcast like mine, we’re often going to be talking to scientists of various sorts, theoretical scientists in particular, some of my favorites, not all of them. SPACETIME AND GEOMETRY Spacetime and Geometry An Introduction to General Relativity . Spacetime and Geometry is a graduate-level textbook on general relativity.. Notice: Spacetime and Geometry recently changed publishers, from Pearson to Cambridge University Press. It is exactly the same book, just with a different cover.. Buy it: Amazon.com * Cambridge "For if each Star is little more a mathematical Point, DOES THE UNIVERSE NEED GOD? Sean Carroll, California Institute of Technology The Blackwell Companion to Science and Christianity, ed. James B. Stump and Alan G. Padgett, forthcoming. PDF Version. “In the beginning, God created the heavens and the earth.” In many religious traditions, one of the standard roles of the deity has been to create the universe. 118 | ADAM RIESS ON THE EXPANSION OF THE UNIVERSE AND A Support Mindscape on Patreon.. Adam Riess received his Ph.D. in astronomy from Harvard University. He is currently Bloomberg Distinguished Professor and Thomas J. Barber Professor of Physics and Astronomy at Johns Hopkins University and a Senior member of the Science Staff at the Space Telescope Science Institute. 87 | KARL FRISTON ON BRAINS, PREDICTIONS, AND FREE ENERGY Support Mindscape on Patreon.. Karl Friston received his medical degree from King’s College Hospital, London. He is currently Professor at the Institute of Neurology, University College London, and Wellcome Principal Research Fellow and Scientific Director of 146 | EMILY RIEHL ON TOPOLOGY, CATEGORIES, AND THE FUTURE “A way that math can make the world a better place is by making it a more interesting place to be a conscious being.” So says mathematician Emily Riehl near the start of this episode, and it’s a good summary of what’s to come. 141 | ZEYNEP TUFEKCI ON INFORMATION AND ATTENTION IN A Support Mindscape on Patreon.. Zeynep Tufekci received a Ph.D. in sociology from the University of Texas-Austin. She is currently an Associate Professor in the School of Information and Library Science at the University of North Carolina, Chapel Hill, and will be a Visiting Professor at the Craig Newmark Center for Journalism Ethics and Security at Columbia University.SEAN CARROLL
Sean Carroll – Preposterous Universe. I'm interested in how the world works at the deepest levels, which leads me to do research in physics and philosophy. My current interests include foundational questions in quantum mechanics, spacetime, statistical mechanics, complexity, and cosmology, with occasional dabblings elsewhere. SEAN CARROLL’S MINDSCAPE PODCAST Sean Carroll's Mindscape Podcast. Sean Carroll hosts conversations with the world's most interesting thinkers. Science, society, philosophy, culture, arts, and ideas. LECTURE NOTES ON GENERAL RELATIVITY This set of lecture notes on general relativity has been expanded into a textbook, Spacetime and Geometry: An Introduction to General Relativity, available for purchase online or at finer bookstores everywhere.About 50% of the book is completely new; I've also polished and improved many of the explanations, and made the organization more flexible and user-friendly. BIGGEST IDEAS IN THE UNIVERSE One such is the idea of a “critical” system, balanced at a point where there is interesting dynamics at all scales. We know a lot about such systems, without approaching anything like a complete understanding just yet. The Biggest Ideas in the Universe | 23. Criticality and Complexity. QUANTUM MECHANICS III (PHYSICS 125C) Quantum Mechanics III (Physics 125c) Sean Carroll, Physics Department, Caltech Spring quarter, 2017. Artist's impression of entangled particles, from YouTube/stargazer via Business Insider. Announcements. Final exam for seniors and graduate students will be available at noonon
144 | SOLO: ARE WE MOVING BEYOND THE STANDARD MODEL 1:08:38.5 SC: We’re allowed to be a little bit hopeful to say, maybe this is it, maybe this is the time that we go beyond the standard model, the first truly new surprising result that was completely unexpected in a particle physics experiment since the 1970s, a particle physics experiment here on Earth. 141 | ZEYNEP TUFEKCI ON INFORMATION AND ATTENTION IN A Support Mindscape on Patreon.. Zeynep Tufekci received a Ph.D. in sociology from the University of Texas-Austin. She is currently an Associate Professor in the School of Information and Library Science at the University of North Carolina, Chapel Hill, and will be a Visiting Professor at the Craig Newmark Center for Journalism Ethics and Security at Columbia University.THE FLOW OF TIME
The Flow of Time. I Tweeted the following inscrutable remark. Probably best left unexplained, but upon reflection I can’t resist. My consciousness freely travels up and down my world line, but sadly it only carries the memories appropriate to the moment it inhabits. The point is that (some) people don’t think about the flow of time inthe
1 THE MACH-ZEHNDER INTERFEROMETER gure, the unitary U p describing each of the two (identical) beamsplitters and the unitary U p describing the phase shifter are given by U b= 1 p 2 (j0i+ j1i)h0j+ 1 p 2 (j0ij 1i)h1j (1) U p= j0ih0j+ ei˚j1ih1j: (2) The photodetectors make a measurement of how the photon exited the interferometer, and CORE THEORY T-SHIRTS Core Theory T-Shirts. Way back when, for purposes of giving a talk, I made a figure that displayed the world of everyday experience in one equation. The label reflects the fact that the laws of physics underlying everyday life are completely understood. So now there are T-shirts. (See below to purchase your own.)SEAN CARROLL
Sean Carroll – Preposterous Universe. I'm interested in how the world works at the deepest levels, which leads me to do research in physics and philosophy. My current interests include foundational questions in quantum mechanics, spacetime, statistical mechanics, complexity, and cosmology, with occasional dabblings elsewhere. SEAN CARROLL’S MINDSCAPE PODCAST Sean Carroll's Mindscape Podcast. Sean Carroll hosts conversations with the world's most interesting thinkers. Science, society, philosophy, culture, arts, and ideas. LECTURE NOTES ON GENERAL RELATIVITY This set of lecture notes on general relativity has been expanded into a textbook, Spacetime and Geometry: An Introduction to General Relativity, available for purchase online or at finer bookstores everywhere.About 50% of the book is completely new; I've also polished and improved many of the explanations, and made the organization more flexible and user-friendly. BIGGEST IDEAS IN THE UNIVERSE One such is the idea of a “critical” system, balanced at a point where there is interesting dynamics at all scales. We know a lot about such systems, without approaching anything like a complete understanding just yet. The Biggest Ideas in the Universe | 23. Criticality and Complexity. QUANTUM MECHANICS III (PHYSICS 125C) Quantum Mechanics III (Physics 125c) Sean Carroll, Physics Department, Caltech Spring quarter, 2017. Artist's impression of entangled particles, from YouTube/stargazer via Business Insider. Announcements. Final exam for seniors and graduate students will be available at noonon
144 | SOLO: ARE WE MOVING BEYOND THE STANDARD MODEL 1:08:38.5 SC: We’re allowed to be a little bit hopeful to say, maybe this is it, maybe this is the time that we go beyond the standard model, the first truly new surprising result that was completely unexpected in a particle physics experiment since the 1970s, a particle physics experiment here on Earth. 141 | ZEYNEP TUFEKCI ON INFORMATION AND ATTENTION IN A Support Mindscape on Patreon.. Zeynep Tufekci received a Ph.D. in sociology from the University of Texas-Austin. She is currently an Associate Professor in the School of Information and Library Science at the University of North Carolina, Chapel Hill, and will be a Visiting Professor at the Craig Newmark Center for Journalism Ethics and Security at Columbia University.THE FLOW OF TIME
The Flow of Time. I Tweeted the following inscrutable remark. Probably best left unexplained, but upon reflection I can’t resist. My consciousness freely travels up and down my world line, but sadly it only carries the memories appropriate to the moment it inhabits. The point is that (some) people don’t think about the flow of time inthe
1 THE MACH-ZEHNDER INTERFEROMETER gure, the unitary U p describing each of the two (identical) beamsplitters and the unitary U p describing the phase shifter are given by U b= 1 p 2 (j0i+ j1i)h0j+ 1 p 2 (j0ij 1i)h1j (1) U p= j0ih0j+ ei˚j1ih1j: (2) The photodetectors make a measurement of how the photon exited the interferometer, and CORE THEORY T-SHIRTS Core Theory T-Shirts. Way back when, for purposes of giving a talk, I made a figure that displayed the world of everyday experience in one equation. The label reflects the fact that the laws of physics underlying everyday life are completely understood. So now there are T-shirts. (See below to purchase your own.) JUNE 2021 – SEAN CARROLL Patreon for recurring donations. Patreon supporters can listen to episodes ad-free, and get monthly Ask Me Anything episodes. One-time donations are also possible via Paypal, though unfortunately no tangible benefits accrue.SEAN CARROLL
Conservation of energy is a somewhat sacred principle in physics, though it can be tricky in certain circumstances, such as an expanding universe.Quantum mechanics is another context in which energy conservation is a subtle thing — so much so that it’s still worth writing papers about, which Jackie Lodman and I recently did.In this blog post I’d like to explain two things: 150 | SIMON DEDEO ON HOW EXPLANATIONS WORK AND WHY THEY Click above to close. 0:00:00.1 Sean Carroll: Hello, everyone. Welcome to the Mindscape Podcast. I’m your host, Sean Carroll. Obviously, on a podcast like mine, we’re often going to be talking to scientists of various sorts, theoretical scientists in particular, some of my favorites, not all of them. PHYSICS - SEAN CARROLL Patreon for recurring donations. Patreon supporters can listen to episodes ad-free, and get monthly Ask Me Anything episodes. One-time donations are also possible via Paypal, though unfortunately no tangible benefits accrue. 148 | HENRY FARRELL ON DEMOCRACY AS A PROBLEM-SOLVING David Graeber’s “Debt: the first five thousand years” would be a useful contributor of context for this discussion. The rise of states and markets together, during the Axial Age empires, created the definition of “self- interest” that is common among economists ( and hence many others) to this day.SEAN CARROLL
Will Baude at Crescat Sententia asks two profound questions that we at Preposterous are happy to answer.. First: What is the appropriate honorific for a professor at the University of Chicago? There’s a story one sometimes hears to the effect that everyone (students, faculty, presumably researchers) at the UofC refers to each other by Mr/Ms, in sort of a charming reverse-snobbery. THE BIGGEST IDEAS IN THE UNIVERSE The Biggest Ideas in the Universe | 7. Quantum Mechanics. I thought about making the title for this week’s Idea simply “Quantum,” since one-word titles are kind of cool, but ultimately decided that accuracy was a higher priority than coolness. That’s why I’ll never be cool. Anyway, quantum mechanics!EINSTEIN AND PI
Einstein and Pi. Each year, the 14th of March is celebrated by scientifically-minded folks for two good reasons. First, it’s Einstein’s birthday (happy 135th, Albert!). Second, it’s Pi Day, because 3/14 is the closest calendrical approximation we have to the decimal expansion of pi, π =3.1415927. Both of these features —Einstein
THE FLOW OF TIME
The Flow of Time. I Tweeted the following inscrutable remark. Probably best left unexplained, but upon reflection I can’t resist. My consciousness freely travels up and down my world line, but sadly it only carries the memories appropriate to the moment it inhabits. The point is that (some) people don’t think about the flow of time inthe
IS THERE LIFE AFTER DEATH? A DEBATE This is an Intelligence Squared debate, which is a series of Oxford-style formal debates that are held around the world, often with quite impressive participants. Four people, two on each side of a resolution. Seven-minute opening statements, round-tableSkip to content
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I'm interested in how the world works at the deepest levels, which leads me to do research in physics and philosophy. My current interests include foundational questions in quantum mechanics, spacetime, statistical mechanics, complexity, and cosmology, with occasional dabblings elsewhere. My most recent book, _Something DeeplyHidden_ ,
is about quantum mechanics, Many Worlds, and the emergence of spacetime. I host a podcast, _Mindscape_ , where I interview smart people about all sorts of interesting ideas. My official titles are Research Professor of Physics at Caltech and External Professor at the Santa Fe Institute . I live in Los Angeles with my lovely wife, writer Jennifer Ouellette.
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