Abhay Ashtekar: Loop Quantum Cosmology Replaces the Big Bang
3 tim 48 min•1 augusti 2022
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Abhay Ashtekar examines Gödel universes, time travel paradoxes, and loop quantum cosmology's latest advances They explore how consciousness, philosophy and physics intersect and debate the prospects of a quantum bounce replacing the Big Bang.
0:00 Introduction
0:00 Inner World vs Outer World
5:35 Buddha's Poison Arrow
11:05 Merging philosophy and physics
13:33 Buddha not wrong
19:30 Studying enlightenment scientifically
23:29 Psychedelics caution
25:17 Loop Quantum Gravity overview
36:39 Wheeler‑DeWitt equation
44:48 Self‑dual and anti‑self‑dual
48:16 Hodge dual and metric
52:06 Linearized gravity
55:32 Quantum gravity
1:03:22 Einstein vs Schrödinger
1:09:24 Quantizing geometry details
1:13:41 Yang‑Mills theory intro
1:20:52 Tetrads and vierbeins
1:24:26 Penrose’s twistor theory
1:26:44 Einstein’s hole argument
1:40:48 Mach’s principle
1:49:04 Singularities and black holes
2:12:18 Quantum bounce (Ashtekar bounce)
2:23:07 Pure and mixed quantum states
2:26:38 Black holes and horizons
2:42:09 ADM decomposition
2:43:55 Gödel universe, time travel, CTCs
2:52:38 Superforce question
2:56:13 Universe before the Big Bang
3:01:44 String theory vs LQG
3:17:31 Ed Witten critiques LQG
3:21:14 Duality between string theory and LQG
3:25:20 Philosopher and monk discussion
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- Subreddit r/TheoriesOfEverything: https://reddit.com/r/theoriesofeverything
- Merch: https://tinyurl.com/TOEmerch
- Physics and Consciousness Contest: https://youtu.be/V93GQaDtv8w
- Dialect's video on Newton's Bucket: https://www.youtube.com/watch?v=Jz3mOlUOGoY
- Brian Roberts (physicist and philosopher): https://personal.lse.ac.uk/robert49/
- The Monk and the Philosopher: https://amzn.to/3Bva2mf
- More on the Gödel Universe: https://doi.org/10.1088/1367-2630/15/1/013063
- Better Left Unsaid documentary: http://betterleftunsaidfilm.com
0:00 Introduction
0:00 Inner World vs Outer World
5:35 Buddha's Poison Arrow
11:05 Merging philosophy and physics
13:33 Buddha not wrong
19:30 Studying enlightenment scientifically
23:29 Psychedelics caution
25:17 Loop Quantum Gravity overview
36:39 Wheeler‑DeWitt equation
44:48 Self‑dual and anti‑self‑dual
48:16 Hodge dual and metric
52:06 Linearized gravity
55:32 Quantum gravity
1:03:22 Einstein vs Schrödinger
1:09:24 Quantizing geometry details
1:13:41 Yang‑Mills theory intro
1:20:52 Tetrads and vierbeins
1:24:26 Penrose’s twistor theory
1:26:44 Einstein’s hole argument
1:40:48 Mach’s principle
1:49:04 Singularities and black holes
2:12:18 Quantum bounce (Ashtekar bounce)
2:23:07 Pure and mixed quantum states
2:26:38 Black holes and horizons
2:42:09 ADM decomposition
2:43:55 Gödel universe, time travel, CTCs
2:52:38 Superforce question
2:56:13 Universe before the Big Bang
3:01:44 String theory vs LQG
3:17:31 Ed Witten critiques LQG
3:21:14 Duality between string theory and LQG
3:25:20 Philosopher and monk discussion
SPONSORS:
- Brilliant: 20% off at https://brilliant.org/TOE
- NordVPN: exclusive deal at https://nordvpn.com/theories
- Manscaped: 20% off and free shipping with code [EVERYTHING20]
- Wren: climate pledge at https://wren.co/theories
- Trade Coffee: $30 off first order plus free shipping at https://drinktrade.com/everything
- ButcherBox: two steaks and lobster claw free at https://butcherbox.com/THEORIES
RESOURCES:
- YouTube link: https://youtu.be/03ReIvXKrrU
- Patreon: https://patreon.com/curtjaimungal
- Crypto: https://nowpayments.io/donation/TOE
- PayPal: https://tinyurl.com/paypalTOE
- Twitter: https://twitter.com/TOEwithCurt
- Discord Invite: https://discord.com/invite/kBcnfNVwqs
- iTunes: https://podcasts.apple.com/ca/podcast/better-left-unsaid-with-curt-jaimungal/id1521758802
- Pandora: https://pdora.co/33b9lfP
- Spotify: https://open.spotify.com/show/4gL14b92xAErofYQA7bU4e
- Subreddit r/TheoriesOfEverything: https://reddit.com/r/theoriesofeverything
- Merch: https://tinyurl.com/TOEmerch
- Physics and Consciousness Contest: https://youtu.be/V93GQaDtv8w
- Dialect's video on Newton's Bucket: https://www.youtube.com/watch?v=Jz3mOlUOGoY
- Brian Roberts (physicist and philosopher): https://personal.lse.ac.uk/robert49/
- The Monk and the Philosopher: https://amzn.to/3Bva2mf
- More on the Gödel Universe: https://doi.org/10.1088/1367-2630/15/1/013063
- Better Left Unsaid documentary: http://betterleftunsaidfilm.com
Theories of Everything with Curt Jaimungal features long-form, technically detailed interviews with leading researchers in physics, mathematics, consciousness, and philosophy, exploring topics at the level of active research. For academics, graduate students, and anyone seeking depth beyond popular science.
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