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Physics Frontiers
Journeys to the Outer Limits of Theoretical Physics
Category: Natural Sciences
Location:
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by Jim Rantschler
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May 24, 2018 04:56 AM PDT

Jim and Randy discuss the consistent histories interpretation of quantum mechanics. The brainchild of Robert Griffiths and with a surprisingly strong set of supporters, Consistent Histories seems to be a strong, logical description of what happens in the quantum world.

Show Notes: http://frontiers.physicsfm.com/30

May 15, 2018 06:36 PM PDT

Jim and Randy discuss how modifications to general relativity can be used to mimic the effects of dark energy. They discuss various forms of gravitational theory that can do the job, as well as the field particles that mediate their "fifth force."

Show Notes: http://frontiers.physicsfm.com/29

April 24, 2018 07:43 PM PDT

Jim and Randy review two very convincing papers that make the claim that the Casimir effect is due to materials fluctuations and not the zero point energy.

Show Notes: http://frontiers.physicsfm.com/28

April 14, 2018 05:02 PM PDT

Jim talks to Randy about the different ways in which the equivalence principle of general relativity can be formulated. More than just the equivalence of accelerations, the different possible meanings of the equivalence principle mean different things about how gravity works. From weak to strong, from Einstein's equivalence principle to Schiff's conjecture, the implications of these theories are explored.

Show Notes: http://frontiers.physicsfm.com/27

March 25, 2018 12:26 PM PDT

Randy shows Jim an idea for generating antimatter using the Casimir effect that doesn't require a collider.

Show Notes: http://frontiers.physicsfm.com/26

March 15, 2018 07:38 PM PDT

Randy introduces Jim to several ways in which people have theorized that gravity can be used to propel an object through space. The slingshot effect is the only proven method here, but people have found many ways that theoretically could induce propulsion taking advantage of non-commutative motions in space-time, negative inertia, artificially-induced gravitational dipoles, and creating bubbles in space-time.

Show Notes: http://frontiers.physicsfm.com/25

February 23, 2018 08:31 PM PST

Randy tells Jim about the island of stability: a theoretically predicted oasis of stable nuclear isotopes that researchers keep getting nearer and nearer to discovering. Randy and Jim talk about what they are, how researchers are trying to produce the isotopes, and the theoretical methods that predict their existence.

Show Notes: http://frontiers.physicsfm.com/24

February 08, 2018 07:35 PM PST

Randy helps Jim get a handle on Dark Energy. Why do we need it? What could it be? What does it have to do with you? How close are we to knowing anything about it?

Show Notes: http://frontiers.physicsfm.com/23

January 21, 2018 05:35 PM PST

Jim and Randy discuss quasiparticles recently found in condensed matter systems that mirror particles theorized nearly a hundred years ago, but never found in the vacuum. Weyl particles are massless fermions, and once it was hoped that neutrinos would turn out to be this kind of particle, and Majorana fermions have real-valued wave functions and therefore many strange and possibly useful properties.

Show Notes: http://frontiers.physicsfm.com/22

January 10, 2018 07:09 PM PST

Randy tells Jim about a scheme that uses Mach's Principle - the idea that there is a preferred background frame with respect to the fixed stars - to explain the origin of inertia.

Show Notes: http://frontiers.physicsfm.com/21

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