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Recorded: 2022/03/21 Released: 2022/05/22
Jim talks to Michal Eckstein of the Coperincus Center for Interdisciplinary Studies on how two different ways to order events, that of chronology (this comes before that) and causality (this makes that happen) come together to define time. We then go on to discuss the Experiment Paradox, which pulls together a number of measurement paradoxes in physics.
------------------------------------------- Notes:
1. Michal Eckstein's articles we discussed in this program:
- Eckstein, M. and M. Heller, "Causality and Time Order -- Relativistic and Probabilistic Aspects." (2022) [arXiv]
- Eckstein, M. and P. Horodecki, “The Experiment Paradox in Physics.” Foundations of Science 27, 1 (2020). [arXiv]
- Eckstein, M., P. Horodecki, R. Horodecki, and T. Miller, "Operational Causality in Spacetime" Phys. Rev. A 101 042128 (2020). [arXiv]
- Ehlers, J., F.A.E. Pirani, A. Schild, “The Geometry of Free Fall and Light Propagation [2012 Republication].” General Relativity: Papers in Honour of J. L. Synge, 63. (1972).
- Linnemann, N. and J. Read, "Constructive Axiomatics in Spacetime Physics Part I: Walkthrough to the Ehlers-Pirani-Schild Axiomatisation" (2021). [arXiv]
- Minguzzi, E. and M. Sanchez, "The Causal Heirarchy of Space Times." Recent Developments in Pseudo-Riemannian Geometry, 299 (2008). [arXiv]
- Physics Frontiers 62: Deformed Special Relativity.
- Physics Frontiers 46: Wigner's Friend
- Physics Frontiers 45: Loop Quantum Gravity
- Physics Frontiers 44: Spooky Action at a Distance
- Physics Frontiers 38: Why Is Space-Time Four Dimensional?
- Physics Frontiers 33: Retrocausality
- Physics Frontiers 30: The Consistent Hisotories Interpretation of Quantum Mechanics
- Physics Frontiers 27: The Gravitational Equivalence Principles
- Physics Frontiers 17: The Physics of Time Travel
- Physics Frontiers 12: A Gravitational Arrow of Time
- Physics Frontiers 9: f(R) Theories of Gravity
| ← Previous ( Born's Rule ) | Sunday, April 24, 2022Born's Rule
Recorded: 2022/01/18 Released: 2022/04/24 Jim discusses Gleason's Theorem with Blake C. Stacey of the University of Massachuesetts - Boston. Gleason's Theorem is a theorem in the foundations of quantum mechanics that, for a system meets some simple requirements, you can find a set of valid staes and a rule for calculating probailities, a la the Born Rule. This is the first part of the interview, the next will be on Blake's discussion of how people are trying to reformulate the Born Rule. ------------------------------------------- Notes: 1. Papers we both read for this program:
Sunday, March 20, 2022Gleason's Theorem
Recorded: 2022/01/18 Released: 2022/03/20 Jim discusses Gleason's Theorem with Blake C. Stacey of the University of Massachuesetts - Boston. Gleason's Theorem is a theorem in the foundations of quantum mechanics that, for a system meets some simple requirements, you can find a set of valid staes and a rule for calculating probailities, a la the Born Rule. This is the first part of the interview, the next will be on Blake's discussion of how people are trying to reformulate the Born Rule. ------------------------------------------- Notes: 1. Papers we both read for this program:
4. Physics-Physique-Fisika, the journal Blake Stacey mentioned in our discussion. 5. Related Episodes of Physics Frontiers: 6. Please visit and comment on our subreddit, YouTube Channel and if you can help us keep this going by contributing to our Patreon, we'd be grateful.
Sunday, February 13, 2022Deformed Special Relativity
Recorded: 2021/08/08 Released: 2022/02/13 Randy and Jim discuss first order corrections to special relativity in light of quantum gravity: deformed special relativity. What should happen to space time if a minimum length scale is introduced to special relativity? ------------------------------------------- Notes: 1. Papers we both read for this program:
Sunday, October 31, 2021Dark Stars
Recorded: 2021/06/10 Released: 2021/10/31 Randy and Jim discuss various proposals for objects that mimic black holes. Most of these are based on physics that disallows an infinitely dense point at the center of the black hole, such as string theory or loop quantum gravity, and some include very exotic matter. ------------------------------------------- Notes: 1. Papers we both read for this program:
Sunday, September 12, 2021Warp Bubbles
Recorded: 2021/03/25 Released: 2021/09/12 Randy tells Jim about solutions in general relativity that allow for isolated bubbles of spacetime that could, possibly, travel faster than light. ------------------------------------------- Notes: 1. Papers we both read for this program:
Monday, July 5, 2021The Hubble Crisis
Recorded: 2021/01/07 Released: 2021/07/05 Randy and Jim the differences between measurements in the Hubble constant and some proposals to resolve the issue. ------------------------------------------- Notes: 1. The papers we read for this program:
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