Sunday, September 12, 2021

Warp Bubbles

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Recorded: 2021/03/25 Released: 2021/09/12

Randy tells Jim about solutions in general relativity that allow for isolated bubbles of spacetime that could, possibly, travel faster than light.
------------------------------------------- Notes:

1. Papers we both read for this program:
2. Other papers one or the other of us read: 3. Related Episodes of Physics Frontiers:
  • Physics Frontiers 6: General Relativity for the Experimentalist
  • 4. Please visit and comment on our subreddit, YouTube Channel and if you can help us keep this going by contributing to our Patreon, we'd be grateful.
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    Monday, July 5, 2021

    The Hubble Crisis

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    Recorded: 2021/01/07 Released: 2021/07/05

    Randy and Jim the differences between measurements in the Hubble constant and some proposals to resolve the issue.
    ------------------------------------------- Notes:

    1. The papers we read for this program:
    2. Related Episodes of Physics Frontiers:
    3. Wendy Freedman recently published this article about the same topic, which some people say resolves the tension (It came out in the arXiv in June, we recorded in January, so it wasn't included). After going through it this weekend (7/17-18), I don't think it makes as strong a conclusion as the press made out, but it is worth reading, even at 48 pages. 4. Please visit and comment on our subreddit, YouTube Channel and if you can help us keep this going by contributing to our Patreon, we'd be grateful.
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    Sunday, June 6, 2021

    Phantom Matter

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    Recorded: 2020/11/09 Released: 2021/06/06

    Randy and Jim discuss a set of potential theories that could constitute dark matter that connect to normal matter through the Higgs particle.
    ------------------------------------------- Notes:

    1. The papers we read for this program:
    2. Related Episodes of Physics Frontiers:
    3. Jim recently appeared on Anthony Jeannot's Highbrow Drivel podcast, displaying his innate ability to talk out of his ass for 60 minutes. Check it out. 3. Please visit and comment on our subreddit, YouTube Channel and if you can help us keep this going by contributing to our Patreon, we'd be grateful.
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    Transcript (Rough Draft)
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    Sunday, May 2, 2021

    Quantum Effects in Gravitational Waves

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    Recorded: 2020/10/01 Released: 2021/05/02

    Jim and Randy discuss two proposals for experiments that would be sensitive to a quantum particle of gravity. Unlike electromagnetism where the quanitzation of matter requires a photon field, the quantization of matter does not require quantized gravitons.
    ------------------------------------------- Notes:

    1. The papers we read for this program:
    2. Other papers mention in this podcast:
    • Dyson, F. "Is a Graviton Detectable?." Int. J. Mod. Phys. A 28, 1330041 (2013). [pdf
    • Feynman, R., "The Quantum Theory of Gravitation." Acta Phys.Polon. 24 (1963) 697-722 24, 697 (1963).
    3. Related Episodes of Physics Frontiers:
    4. Randy mentioned our first podcast, Physics FM where we were discussing Aharonov and Rohrlich's Quantum Paradoxes.
    5. Please visit and comment on our subreddit, and if you can help us keep this going by contributing to our Patreon, we'd be grateful.
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    Transcript (Rough Draft)
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    Thursday, April 1, 2021

    The Anomalous Magnetic Moment of the Muon

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    Recorded: 2020/07/23 Released: 2021/04/01

    Jim and Randy discuss measurements of the anomalous magnetic moment of the muon, as well as what the discrepency between theory and experiment might mean as far as new physics.
    ------------------------------------------- Notes:

    1. The papers we read for this program:
    2. Related Episodes of Physics Frontiers:
    3. Fermilab's Muon g-2 Experiment.
    4. The Mathematica Notebook mentioned in the first article. You can use this to explore different kinds of beyond the standartd model particles in the way the authors did.
    5 Jim mentioned Melvin Schwartz's Principles of Electrodynamics [Amazon], an old textbook that goes into the details of the measurement of the anomalous magnetic moment. Because this is at least the second time I've used it extensively for the podcast, I have made a video, available here describing the book. Fortunately, my phone only had space for a 14 minute video, so I had to shut up about it.
    6. Please visit and comment on our subreddit, and if you can help us keep this going by contributing to our Patreon, we'd be grateful.
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    Transcript (Rough Draft)
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