Thursday, December 8, 2016

Gravitoelectromagnetism


(Recorded: 10/22/2016) (Published: 12/6/2017)

Randy talks to Jim about gravitoelectromagnetism. Based on the similarity between Newtonian gravity and electrostatics, there should be a second gravitational field,the gravitomagnetic field. What are the implications of the existence of such a field, and how large are those effects?

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Notes:
1. The books referred to in this podcast:

(A) Mirror Matter by Robert Forward, a book about antimatter.
(B) Collective Electrodynamics by Carver Mead, a book arguing for the primacy of the vector potential in electromagnetism.
(C) Quantum Paradoxes by Aharonov and Rohrlich, which uses the pseudo-paradoxes of quantum physics to explore the meaning of the quantum world. In it, it discusses the Aharonov-Bohm effect.

2. Physics Frontiers episodes related to this one:

The previous episode we referred to:
(A) Physics Frontiers 1: The Gravitational 4-Vector of Carver Mead

An episode where we discuss the papers by Robert Forward we referred to here:
(B) Physics Frontiers 6: General Relativity for the Experimentalist
(C) Physics Frontiers 25: Graviational Field Propulsion

Other related episodes:
(D) Physics Frontiers 12: A Gravitational Arrow of Time
(E) Physics Frontiers 31: The Parameterized Post-Newtonian Framework

3. The Quantum Paradoxes episode referred to in this episode was Quantum Paradoxes 4: Phases and Gauges, about the Aharonov-Bohm effect.

4. Our subreddit.

Tuesday, November 15, 2016

The de Broglie-Bohm Pilot Wave Interpretation of Quantum Mechanics

Jim talks to Randy about the pilot wave interpretation of quantum mechanics, which separates the particle and wave behavior of a non-relativistic quantum particle into that of a particle moving in and exciting a quantum mechanical medium.



Note:

Also check out our PhysicsFM episode Quantum Cats, which talks about various interpretations of quantum mechanics in light of Schrodinger's Cat.

David Bohm's Quantum Mechanics. I don't think he talks about this anywhere in it.

A Veritasium video on pilot wave dynamics, the "oil droplets" that we're talking about in the podcast, which shows the physical analogy at the heart of David Bohm's interpretation. This came out after we recorded the episode and before I started editing it.

PhysicsFM, our main podcast.

Check out Quantum Cats in particular, which discusses the need for an interpretation of quantum mechnics.

Also, we discussed Quantum Metaphysics as preparation for PhysicsFM9, which goes into even more detail about this. Our subreddit. Annoy us there.

Monday, October 31, 2016

G4V: The Gravitational 4-Vector Formulation of Gravity

Straight from PhysicsFM--Randy Morrison and Jim Rantschler discuss topics in physics.



Randy talks to Jim about Carver Mead's G4V, a formulation of gravitation combining the equivalence of inertial and gravitational mass with a vector potential formulation of gravitation (a 4-vector form, with the usual gravitational potential in the temporal component).

Notes:

Carver Mead's Lecture that we discuss in this episode.

Carver Mead's book Collective Electrodynamics: Quantum Foundations of Electromagnetism, which is an interesting argument for the fundamentality of the vector potential in electrodynamics.

Clifford Will's Theory and Experiment in Gravitational Physics, which discusses the theories of gravitation still considered viable at the time of its publication and the ways in which they are tested. This book is also referenced in the discussion.

PhysicsFM our main podcast.

Our subreddit.