47 afleveringen

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

Physics Frontiers Jim Rantschler

    • Natuurkunde

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

    The Gertsenshtein Effect

    The Gertsenshtein Effect

    Randy introduces Jim to the Gertsenshtein effect, the conversion of gravitational waves to electromagnetic waves through resonances.

    Show Notes: http://frontiers.physicsfm.com/48

    • 40 min.
    Bimetric Gravity

    Bimetric Gravity

    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

    • 46 min.
    Wigner's Friend

    Wigner's Friend

    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

    • 44 min.
    Loop Quantum Gravity

    Loop Quantum Gravity

    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.

    • 44 min.
    Spooky Action at a Distance

    Spooky Action at a Distance

    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

    • 47 min.
    The Positive Energy Theorem

    The Positive Energy Theorem

    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

    • 34 min.

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