PODCAST

PhysicsFM

James Rantschler

Randy and Jim discuss topics in physics.

science natural sciences

All Episodes

32:20

Episode 5: Counting Unvierses

PhysicsFM ·

2021/10/25

Jim goes on a diatribe about infinities and the multiverse.

en-us

21:58

Entropy v. Entropy

PhysicsFM ·

2020/06/19

In this episode, I discuss a paper talking about the relationship between physical entropy and information-theoretic entropy in the context of quantum communication.

en-us

24:18

The Machine in the Ghost

PhysicsFM ·

2020/05/14

This week, I talk about the fate of the universe in Bohmian Cosmology. Specifically, how Torres, Fabris, and Piattella use the de Broglie-Bohm interpretation of quantum mechanics to modify the Wheeler-De Witt equation in the an accelerating universe.Show Notes: http://papers.physicsfm.com/3

en-us

32:25

Itty Bitty Physics

PhysicsFM ·

2020/04/30

I talk about a paper by John Archibald Wheeler, "Information, Physics, Quantum: The Search for Links."Show Notes: http://papers.physicsfm.com/2

en-us

29:36

The Quantum Bookie

PhysicsFM ·

2020/04/19

I talk about Quantum Bayesianism, the extension of the Bayesian interpretation of probability to quantum mechanics, through the work of Christopher Fuchs.Show Notes: http://papers.physicsfm.com/1

en-us

88:17

PhysicsFM - Intermission - Quantum Metaphysics

PhysicsFM ·

2017/03/04

Jim and Randy discuss the ways in which we interpret the wavefunction, quantum indeterminancy, and other strange things that happen in quantum mechanics -- going through nine classes of interpretation and what they mean about the underlying reasons for quantum mechanical behavior.

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65:41

PhysicsFM - Quantum Paradoxes 9 - Quantum Cats

PhysicsFM ·

2015/08/05

Randy and Jim discuss the implications of Schroedinger's Cat. In light of the measurement problem, in light of the collapse of the wave function, how can you understand what is happening to a quantum mechanical system?

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42:16

PhysicsFM - Quantum Paradoxes 8 - Measurement and...

PhysicsFM ·

2015/07/02

Jim and Randy discuss how "compensation forces" allow measurements of non-canonical variables without the difficulties discovered in the previous episode. They also discuss why some very important concepts of classical physics -- velocity and the electric field -- are not canonical.

en-us

36:23

PhysicsFM - Quantum Paradoxes 7 - Quantum...

PhysicsFM ·

2015/04/22

Randy and Jim talk about measurements of quantum systems, specifically in terms of a paradox involving the measurement of the velocity. This includes a long discussion of the von Neumann model of quantum mechanics.

en-us

52:09

PhysicsFM - Quantum Paradoxes 6 - Nonlocality and...

PhysicsFM ·

2015/03/25

Jim and Randy discuss Aharonov and Rohrlich's suggestion that quantum mechanics should be formulated in terms of axioms based upon its physical peculiarities -- Nonlocality and Causality.

en-us

49:45

PhysicsFM - Quantum Paradoxes 5 - Modular Variables -...

PhysicsFM ·

2015/02/20

Randy and Jim discuss modular variables and how looking at an infinite number of slits in a diffraction grating can better elucidate the process of quantum interference than the two-slit experiment.

en-us

52:04

PhysicsFM - Quantum Paradoxes 4 - Phases and Gauges -...

PhysicsFM ·

2015/01/24

Jim and Randy talk about two paradoxes that help describe the Aharonov-Bohm effect. This requires an excursion into the gauge invariance of the vector potential of electrodynamics -- and how that gauge has real effects in quantum theory, even though it did not in classical physics.

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31:23

PhysicsFM - Quantum Paradoxes 3 - Is Quantum Theory...

PhysicsFM ·

2014/12/20

Randy and Jim discuss the completeness of quantum theory via the EPR Paradox, Bell's Theorem, and the Aspect Experiment and they discuss the Block Universe and David Bohm's interpretation of quantum mechanics.

en-us

38:38

PhysicsFM - Quantum Paradoxes 2 - How to Weigh a...

PhysicsFM ·

2014/11/21

Jim and Randy discuss the meaning of consistency, black body radiation, the Compton effect, uncertainty relationships, single-slit diffraction, and the clock in a box paradox.

en-us

41:31

PhysicsFM - Quantum Paradoxes 1 - The Uses of Paradox...

PhysicsFM ·

2014/10/21

Randy and Jim discuss paradoxes in general, some quantum effects, what paradoxes mean to physics, and the twin paradox.

en-us

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