Space-Time: The Biggest Problem in Physics

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Quote: What is the deepest level of reality? In this Quanta explainer, Vijay Balasubramanian, a physicist at the University of Pennsylvania, takes us on a journey through space-time to investigate what it’s made of, why it’s failing us, and where physics can go next. Explore black holes, holograms, “alien algebra,” and more space-time geometry: https://www.quantamagazine.org/the-un...

00:00
- The Planck length, an intro to space-time
1:23
- Descartes and Newton investigate space and time
2:04
- Einstein's special relativity
2:32 - The geometry of space-time and the manifold
3:16 - Einstein's general relativity: space-time in four dimensions
3:35
- The mathematical curvature of space-time
4:57
- Einstein's field equation
6:04 - Singularities: where general relativity fails
6:50 - Quantum mechanics (amplitudes, entanglement, Schrödinger equation)
8:32 - The problem of quantum gravity
9:38
- Applying quantum mechanics to our manifold
10:36
- Why particle accelerators can't test quantum gravity
11:28
- Is there something deeper than space-time?
11:45 - Hawking and Bekenstein discover black holes have entropy
13:54
- The holographic principle
14:49
- AdS/CFT duality
16:06
- Space-time may emerge from entanglement
17:44
- The path to quantum gravity
'Historically, we may regard materialism as a system of dogma set up to combat orthodox dogma...Accordingly we find that, as ancient orthodoxies disintegrate, materialism more and more gives way to scepticism.'

- Bertrand Russell


[-] The following 2 users Like Sciborg_S_Patel's post:
  • laborde, Jim_Smith
Great video.

He says "That’s going  to require creative new ideas."

He ought to consider the role of consciousness.

He is conscious, but he doesn't seem to recognize that if his physicalist paradigm has a massive gap in it, he might find answers out side that paradigm.
The first gulp from the glass of science will make you an atheist, but at the bottom of the glass God is waiting for you - Werner Heisenberg. (More at my Blog & Website)
(This post was last modified: 2024-09-30, 12:36 AM by Jim_Smith. Edited 1 time in total.)
[-] The following 2 users Like Jim_Smith's post:
  • nbtruthman, Sciborg_S_Patel

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