Physics Frontiers

By Jim RantschlerScience Physics

Physics Frontiers episodes

March 20, 2022 Episode 63: Gleason's Theorem with Blake Stacey
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
45 min
February 13, 2022 Episode 62: Deformed Special Relativity
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

39 min
October 31, 2021 Episode 61: Dark Stars
Jim and Randy talk about alternatives to black holes without event horizons or singularities.

Show Notes: http://frontiers.physicsfm.com/61
43 min
September 12, 2021 Episode 60: Warp Bubbles
Randy tells Jim about developments of metrics describing isolated spacetime bubbles that could, possibly, move faster than light.

Show Notes: http://frontiers.physicsfm.com/60
44 min
July 05, 2021 Episode 59: The Hubble Crisis
Randy and Jim discuss the current tension between measurements of the Hubble constant by different methods, and some attempts to resolve the issue.

Show Notes: http://frontiers.physicsfm.com/59
49 min
June 06, 2021 Episode 58: Phantom Matter
Jim and Randy talk about the Higgs portal to dark matter and the nightmare scenario for particle physicists: what if the LHC never saw any traces of supersymmetric particles?

Show Notes: http://frontiers.physicsfm.com/58
39 min
May 02, 2021 Episode 57: Quantum Effects in Gravitational Waves
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
27 min
April 01, 2021 Episode 56: Anomalous Magnetic Moment of the Muon
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
45 min
December 07, 2020 Episode 55: Multiversality
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
38 min
October 18, 2020 Episode 54: The ANITA Experiment
Randy and Jim talk about the strange results of the ANITA experiment: tau neutrinos that seem to come up out of the Earth.

Notes: http://frontiers.physicsfm.com/54
46 min

About Physics Frontiers

From the publisher's feed

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