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Footage from Videoblocks, Artlist. Other footage from NASA and ESO. Music from Epidemic Sound, Artlist, Silver Maple and Yehezkel Raz. Images of scientists frequently from the AIP Icons from The Noun Project. Quantum Fluctuations by Derek Leinweber.
00:00 Introduction. 04:18 Will The Universe Go On Forever? 17:42 What Lingers In The Long Night? 33:20 What Would It Mean? 46:20 Everything Everywhere
Over the past decades, quantum scientists have introduced various technologies that operate leveraging quantum mechanical effects, including quantum sensors, computers and memory devices. Most of these technologies leverage entanglement, a quantum phenomenon via which two or more particles become intrinsically linked and share a unified quantum state, irrespective of the distance between them.
It’s now time to dig into quantum field theories with considerably more rigor than earlier in the series. First up is quantum electrodynamics, or QED. This was the first successful QFT, combining quantum mechanics and special relativity. Let’s learn what this model is all about, and how to do math with Feynman diagrams.
Script by andrew mattson, physics phd student at johns hopkins university.
What if gravity is not fundamental but emerges from quantum entanglement? In this episode, physicist Ted Jacobson reveals how Einstein’s equations can be derived from thermodynamic principles of the quantum vacuum, reshaping our understanding of space, time, and gravity itself.
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Gravitational waves are ripples in spacetime produced by violent cosmic events, such as the merging of black holes. So far, direct detections have relied on measuring tiny distance changes over kilometer-scale instruments. In a new theoretical study published in Physical Review Letters, researchers at Stockholm University, Nordita, and the University of Tübingen propose an unconventional approach: tracking how gravitational waves reshape the light emitted by atoms. The work describes a possible detection route, but an experimental demonstration remains for the future.
When atoms are excited, they naturally relax by emitting light at a characteristic frequency—a quantum process known as spontaneous emission. This happens through their interaction with the quantum electromagnetic field.
“Gravitational waves modulate the quantum field, which in turn affects spontaneous emission,” said Jerzy Paczos, a Ph.D. student at Stockholm University. “This modulation can shift the frequencies of emitted photons compared with the no-wave case.”
A material thought to be a quantum spin liquid actually exhibits a newly identified magnetic state caused by competing ferromagnetic and antiferromagnetic interactions. Materials that enter a quantum spin liquid phase attract significant attention because of their unusual properties and potential
Physicist Jim Al-Khalili explores the incomprehensible scale of the universe. A cosmic journey into the laws of gravity, relativity, and the formation of supergalaxies. Discover how the largest structures shape our understanding of the cosmos itself.
Director: Tim Usborne. Writers: Jim Al-Khalili, Tim Usborne. Stars: Prof. Jim Al-Khalili (Physicist, Presenter) Genre: Science Documentary, Physics, Cosmology. Country: United Kingdom. Language: English Also Known As: Secrets of Size: Going Big (BBC) Release Date: 2022 Filming Location: United Kingdom / Various International Locations.
Synopsis:
In this second episode of the fascinating series Secrets of Size, Professor Jim Al-Khalili takes us on a cosmic journey into the immensity, exploring the largest scale of the universe.
We leave behind the quantum realm to focus on the forces that govern the largest structures: gravity and relativity. Al-Khalili explains how these laws shape the existence of galaxies, galaxy clusters, and the immense supergalaxies.
The episode reveals the incomprehensible scale of the cosmos, where time and space are distorted, and how the study of these giants allows us to understand the origin, evolution, and perhaps the ultimate destiny of the universe itself.
Up next, Sean Carroll explains the biggest ideas in the universe | Full Interview ► • Sean Carroll explains the biggest ideas in…
A century after the birth of quantum mechanics, physicists still argue about what the theory is really describing. Does the wave function represent something real, or just our knowledge? Why does “measurement” appear in the laws of nature at all?
Sean Carroll reveals how quantum mechanics solved one set of problems while creating a deeper one.
Up next. Brian Cox: The quantum roots of reality | Full Interview ► • Brian Cox: The quantum roots of reality |…
Time feels obvious, but physics tells a stranger story about its existence: Theoretical physicist Jim Al-Khalili explores why our sense of time may be incredibly misleading, including the idea that past, present, and future might all exist at once.
0:00 Chapter 1: Does time flow? 2:42 Why Time Feels Faster as We Age. 3:56 Time and Change in Philosophy and Physics. 5:28 Einstein and the End of Absolute Time. 6:19 Time in the Equations of Physics. 7:50 Chapter 2: How do we reconcile quantum field theory with the general theory of relativity? 12:10 Evidence for Time Dilation: Muons. 14:29 Gravity Slows Time: General Relativity. 19:22 Space-Time and the Block Universe. 21:55 Does Time Really Exist? 26:33 The Debate: Eternalism vs Presentism. 34:12 Chapter 3: Is There a “Now”? 40:40 Chapter 4: Why Does Thermodynamics Have a Direction in Time? 49:38 Quantum Entanglement and the Direction of Time. 55:10 Did Time Begin at the Big Bang? 45:00 Will Time End? 1:05:40 Chapter 5: Is Time Travel Possible?
Slavoj Žižek, Carlo Rovelli, Alenka Zupančič debate subjectivity, and how it relates to the world around it.
What does the hard problem get wrong?
With a free trial, you can watch the full debate NOW at https://iai.tv/video/the-self-and-the… tend to think of ourselves as observers of the world and experience as something different from the material stuff that makes up reality. Yet at the same time as human beings, we are at once part of the universe and part of that reality. And this profoundly puzzling relationship, that we are both part of something and yet separate from it, has been at the centre of Western thought. Materialists claim there is only physical material. But if so, thought, experience, and consciousness become illusory. Idealists argue there is only consciousness, but then it is reality that becomes an illusion. While dualists hold that both the self and the world exist, but that the connection between the two is mysterious. Is the self part of the world or necessarily outside of it? Was Kant right that the distinction between subject and object is necessary for experience to be possible? Or are these deep metaphysical questions beyond us, and our theories and language incapable of uncovering the ultimate state of things? #zizek #philosophy #physics #consciousness #quantum #quantumphysics Slavoj Žižek is one of the most famous philosophers in the world and is the author of more than 50 books, including most recently at the time of the debate Zero Point. Alenka Zupančič is a leading Lacanian philosopher and social theorist. She is a professor at The European Graduate School and at the University of Nova Gorica. Joining from America, Carlo Rovelli is a leading theoretical physicist, the author of several best-selling books, and a founding figure in the field of quantum gravity. His recent book, Reality Is Not What It Seems, has ethical implications for the nature of the self and personal identity. Jack Symes hosts. 00:00 Introduction 00:37 Carlo Rovelli on reality 05:22 Alenka Zupančič: is our knowledge incomplete, or reality itself? 07:55 Slavoj Žižek: how can a stone have freedom? 09:28 Carlo Rovelli on freedom 11:17 Can we ever resolve the relationship between the self and the world around us? 11:35 The problem with David Chalmers The Institute of Art and Ideas features videos and articles from cutting edge thinkers discussing the ideas that are shaping the world, from metaphysics to string theory, technology to democracy, aesthetics to genetics. Subscribe today! https://iai.tv/subscribe?utm_source=Y… For debates and talks: https://iai.tv For articles: https://iai.tv/articles For courses: https://iai.tv/iai-academy/courses.
We tend to think of ourselves as observers of the world and experience as something different from the material stuff that makes up reality. Yet at the same time as human beings, we are at once part of the universe and part of that reality. And this profoundly puzzling relationship, that we are both part of something and yet separate from it, has been at the centre of Western thought. Materialists claim there is only physical material. But if so, thought, experience, and consciousness become illusory. Idealists argue there is only consciousness, but then it is reality that becomes an illusion. While dualists hold that both the self and the world exist, but that the connection between the two is mysterious.
Is the self part of the world or necessarily outside of it? Was Kant right that the distinction between subject and object is necessary for experience to be possible? Or are these deep metaphysical questions beyond us, and our theories and language incapable of uncovering the ultimate state of things?
