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Physics Frontiers
Journeys to the Outer Limits of Theoretical Physics
Category: Science
Location:
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by Jim Rantschler
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November 23, 2019 09:02 PM PST

Randy introduces Jim to Sabine Hossenfelder's bimetric theory of gravity. In this gravitational theory, there are two types of matter whose only interaction is through gravitation. However, each one reacts to space-time differently, resulting in different metric tensors for each. In low-curvature situations, this creates a kind of anti-gravitation.

Show Notes: http://frontiers.physicsfm.com/47

September 21, 2019 07:35 PM PDT

Randy and Jim discuss experiments that purport to show that there is no such thing as objective reality.

Show Notes: http://frontiers.physicsfm.com/46

August 16, 2019 03:32 PM PDT

Jim and Randy discuss loop quantum gravity, and integration of quantum mechanics and gravity that quantizes space-time itself through the use of uncertain quanta of volumes and the random connections between them.

July 15, 2019 06:34 PM PDT

Jim and Randy discuss experiments that put a minimum superluminal speed of communication between parts of a wavefunction.

Show Notes: http://frontiers.physicsfm.com/44

June 06, 2019 08:05 AM PDT

Randy introduces Jim to a refutation of the positive energy theorem in a universe with a cosmological constant.

Show Notes: http://frontiers.physicsfm.com/43

May 03, 2019 08:27 PM PDT

Jim and Randy discuss Eric Verlinde's theory thermodynamic theory of gravity. This theory purports to explain gravitational attraction and inertia through statistical mechanics.

Show Notes: http://frontiers.physicsfm.com/42

February 24, 2019 10:54 AM PST

Randy and Jim discuss the chameleon field -- a way to model dark energy with a scalar boson of varying strength.

Show Notes: http://frontiers.physicsfm.com/41

December 23, 2018 11:53 AM PST

Randy tells Jim about a way to use an extension of an extension of the complex numbers to reveal the nature of elementary particles.

Show Notes: http://frontiers.physicsfm.com/40

December 09, 2018 10:33 AM PST

Randy tells Jim about experiments with Neutrons and Photons in materials that exhibit negative effective mass. Not only do these effects show that the inertial mass of quasiparticles in a material can become negative, they show that these negative mass quasiparticles act like they have negative gravitational mass, as well.

Show Notes: http://frontiers.physicsfm.com/39

November 25, 2018 08:41 AM PST

Jim discusses why the world we observe is 4-dimensional with Randy. We discuss anthropic and fundamental reasons why we need 3 dimensions and no more than one time dimension for reasons of complexity, predictability and stability.

Show Notes: http://frontiers.physicsfm.com/38

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