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Physics Frontiers

Physics Frontiers

Jim Rantschler

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Jim Rantschler and Randy Morrison discuss physics from elementary particles to cosmological effects at the limits of our theoretical knowledge or have recently emerged.

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2 Listeners

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Top 10 Physics Frontiers Episodes

Goodpods has curated a list of the 10 best Physics Frontiers episodes, ranked by the number of listens and likes each episode have garnered from our listeners. If you are listening to Physics Frontiers for the first time, there's no better place to start than with one of these standout episodes. If you are a fan of the show, vote for your favorite Physics Frontiers episode by adding your comments to the episode page.

Physics Frontiers - Episode 55: Multiversality
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12/07/20 • 37 min

Jim and Randy discuss the rationales for multiverses based on quantum mechanics, string theory, and the anthropic principle.
Show Notes: http://frontiers.physicsfm.com/55
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Physics Frontiers - Episode 67: Optical Gravity with Matthew R. Edwards
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08/14/22 • 35 min

Jim talks with Matthew R. Edwards about his theory of Optical Gravity. This is a Le Sage model of gravity based on graviton filiments.
Show Notes: http://frontiers.physicsfm.com/67

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Physics Frontiers - Episode 63: Gleason's Theorem with Blake Stacey
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03/20/22 • 44 min

Jim talks with Blake Stacey about Gleason's Theorem, a foundational topic in the foundations of quantum mechanics. Gleason's theorem gives us a set of characteristic states for a measurement and the probability rule associated measuring them. This is the first part of the interview. The second part will discuss recent attempts to replace the Born Rule.
Show Notes: http://frontiers.physicsfm.com/63

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Physics Frontiers - Episode 57: Quantum Effects in Gravitational Waves
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05/02/21 • 26 min

Randy and Jim talk about two proposals to use gravitational wave interferometry to show that gravitons exist through noise measurements.
Show Notes: http://frontiers.physicsfm.com/57

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Physics Frontiers - Episode 56: Anomalous Magnetic Moment of the Muon
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04/01/21 • 44 min

Jim and Randy discuss the measurements of the anomalous magnetic moment of the muon and some of the ways in which the discrepancy between theory and experiment could manifest themselves in new physics.
Show Notes: http://frontiers.physicsfm.com/56

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Jim talks with James Owen Weatherall about his work on viewing general relativity as an effective field theory and where it should give way to another theory. General relativity does a very good job of describing the world we see in astronomical observations, but certain results, e.g. singularities, and certain limits, e.g. the Planck scale, hint that there should be another theory that supersedes it. Jim Weatherall argues that this is in a high curvature regime.
Show Notes: http://frontiers.physicsfm.com/66

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Jim talks with Michal Eckstein of the Copernicus Institute for Interdisciplinary Studies about how two different kinds of ordering, chronological and causal, give rise to a robust idea of time. Additionally, we discuss the Experiment Paradox, a generalization of other measurement-type paradoxes in physics.
Show Notes: http://frontiers.physicsfm.com/65

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Physics Frontiers - Episode 72: Born Rule and Gravity with Antony Valentini
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04/23/23 • 73 min

Jim talks with Antony Valentini about the difficulties of interpretation of quantum mechanics in light of quantum gravity. In particular, Antony discusses the failure of the Born Rule due to the impossibility of normalization (the fact that probabilities must sum to 100%) at that scale, and therefore the need to interpret the wavefunction as something more than merely the knowledge of the observer about the system. They spend some time talking about the de Broglie-Bohm interpretation in light of quantum gravity.
Show Notes: http://frontiers.physicsfm.com/72

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Physics Frontiers - Episode 62: Deformed Special Relativity
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02/13/22 • 39 min

Jim and Randy talk about how special relativity might be amended to incorporate a minimum length scale. Such scales are common in quantum gravity theories, and in the limit where both QM and GR are less important, QG should induce first order corrections to SR. We then talk about how these corrections seem to lead to unreasonable paradoxes.
Show Notes: http://frontiers.physicsfm.com/62

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Physics Frontiers - Episode 68: Quantum Resource Theories with Gilad Gour
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09/26/22 • 51 min

Jim talks with Gilad Gour of the University of Toronto about quantum resource theories. These are theories of largish systems that describe the relationships between possible states by the different levels of resources required for each. By using resources, a system can move from one state to another. This results in a partial order where between two states there could be two different states inaccessible to one another. Although (usually) these coalesce into an order based on a single property of thermodynamically-sized systems, the entropy, a few do not.
Show Notes: http://frontiers.physicsfm.com/68

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FAQ

How many episodes does Physics Frontiers have?

Physics Frontiers currently has 78 episodes available.

What topics does Physics Frontiers cover?

The podcast is about Podcasts, Science and Physics.

What is the most popular episode on Physics Frontiers?

The episode title 'Episode 55: Multiversality' is the most popular.

What is the average episode length on Physics Frontiers?

The average episode length on Physics Frontiers is 45 minutes.

How often are episodes of Physics Frontiers released?

Episodes of Physics Frontiers are typically released every 29 days, 3 hours.

When was the first episode of Physics Frontiers?

The first episode of Physics Frontiers was released on Oct 31, 2016.

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