Physics Frontiers

https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

Jim and Randy discuss topics in physics, large and small.

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Website
http://physicsfrontiers-rantschler.podomatic.com
Description
Jim and Randy discuss topics in physics, large and small.
Language
🇬🇧 English
last modified
2019-06-07 10:45
last episode published
2019-06-06 15:05
publication frequency
13.35 days
Contributors
Physics Frontiers author  
Explicit
false
Number of Episodes
72
Rss-Feeds
Detail page
Categories
Science & Medicine Natural Sciences

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Episodes

Date Thumb Title & Description Contributors
6.06.2019 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

The Positive Energy Theorem

Randy introduces Jim to a refutation of the positive energy theorem in a universe with a cosmological constant.
4.05.2019 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

Entropic Gravity

Jim and Randy discuss Eric Verlinde's theory thermodynamic theory of gravity. This theory purports to explain gravitational attraction and inertia through statistical mechanics.
24.02.2019 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

The Chameleon Field

Randy and Jim discuss the chameleon field -- a way to model dark energy with a scalar boson of varying strength. Show Notes: http://frontiers.physicsfm.com/41
23.12.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

The Octonions

Randy tells Jim about a way to use an extension of an extension of the complex numbers to reveal the nature of elementary particles. Show Notes: http://frontiers.physicsfm.com/40
9.12.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

Negative Effective Mass

Randy tells Jim about experiments with Neutrons and Photons in materials that exhibit negative effective mass. Not only do these effects show that the inertial mass of quasiparticles in a material can become negative, they show that these negative mas...
25.11.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

The Dimensionality of Space-Time

Jim discusses why the world we observe is 4-dimensional with Randy. We discuss anthropic and fundamental reasons why we need 3 dimensions and no more than one time dimension for reasons of complexity, predictability and stability. Show Notes: http://...
30.10.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

The Einstein-Cartan Torsion Field Theory

Randy explains to Jim theories on how to incorporate a native angular momentum into general relativity. Show Notes: http://frontiers.physicsfm.com/37
15.10.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

The Metamaterial Stress Tensor

Randy tells Jim about recent results in the description of the electromagnetic stress tensor in metamaterials. In particular, we discuss the efforts to computationally model the stress tensor in amorphous metamaterials. Show Notes: http://frontiers.p...
22.09.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

The String Theory Landscape

Jim and Randy explore the landscape of string theory in the anthropic manner put forward by Leonards Susskind. Show Notes: http:frontiers.physicsfm.com/35
10.08.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

CPT Symmetry and Gravitation

CPT Symmetry is a fundamental symmetry in the standard model. Jim and Randy discuss what happens when it is applied to general relativity. Show Notes: frontiers.physicsfm.com/34 [Really sorry for the muted tracks on the first upload. The problem ha...
25.07.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

Retrocausality

Jim and Randy look at how quantum mechanics is affected by time. Most importantly, what happens when temporal boundary conditions are used to create standing waves in the wave function of a particle? Show Notes: http://frontiers.physicsfm.com/33
7.07.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

Tunneling Time

Jim talks to Randy about the amount of time it takes for an electron to tunnel through a forbidden region of space. Astoundingly, how quickly this happens has been a subject of debate for eighty years and is still unresolved. Show Notes: http://fronti...
8.06.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

Post-Newtonian Gravitation

Jim discusses the Parameterized Post-Newtonian formalism with Randy. The PPN framework is a general, linearized metric theory of gravity that can simulate all metric theories of gravity and compare them to solar system sized experiments. Show Notes: ...
8.06.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

Post-Newtonian Gravitation

Jim discusses the Parameterized Post-Newtonian formalism with Randy. The PPN framework is a general, linearized metric theory of gravity that can simulate all metric theories of gravity and compare them to solar system sized experiments. Show Notes: ...
24.05.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

The Consistent Histories Interpretation of Quantum Mechanics

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 t...
24.05.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

The Consistent Histories Interpretation of Quantum Mechanics

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 t...
16.05.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

Gravitational Alternatives to Dark Energy

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." Sh...
16.05.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

Gravitational Alternatives to Dark Energy

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." Sh...
25.04.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

The Quantum Vacuum and the Casimir Effect

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
25.04.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

The Quantum Vacuum and the Casimir Effect

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
15.04.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

The Gravitational Equivalence Principles

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 thing...
15.04.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

The Gravitational Equivalence Principles

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 thing...
25.03.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

Antimatter Production at a Potential Boundary

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
25.03.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

Antimatter Production at a Potential Boundary

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
16.03.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

Gravitational Field Propulsion

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 propul...
16.03.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

Gravitational Field Propulsion

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 propul...
24.02.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

The Island of Stability

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...
24.02.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

The Island of Stability

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...
9.02.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

Dark Energy

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
9.02.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

Dark Energy

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
22.01.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

Weyl and Quasiparticles

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...
22.01.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

Weyl and Quasiparticles

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...
11.01.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

The Origin of Inertia

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
11.01.2018 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

The Origin of Inertia

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
22.12.2017 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

Time Crystals

Jim talks to Randy about structures that are periodic in time like crystals are periodic in space. Show notes: http://frontiers.physicsfm.com/20
22.12.2017 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

Time Crystals

Jim talks to Randy about structures that are periodic in time like crystals are periodic in space. Show notes: http://frontiers.physicsfm.com/20
6.12.2017 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

The 2T Physics of Itzhak Bars

Randy tells Jim about a theory that complements other theories of fundamental physics based upon a phase space symmetry between the 4-position and the 4-momentum of a particle. The upshot of the theory is that there should be a second time dimension a...
6.12.2017 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

The 2T Physics of Itzhak Bars

Randy tells Jim about a theory that complements other theories of fundamental physics based upon a phase space symmetry between the 4-position and the 4-momentum of a particle. The upshot of the theory is that there should be a second time dimension a...
24.11.2017 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

The Physics of Time Travel

Randy and Jim talk about traveling through through time, discussing relativity and, in particular, Kurt Goedel's solution for closed timelike curves in General Relativity. Show notes: http://frontiers.physicsfm.com/17
24.11.2017 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

The Physics of Time Travel

Randy and Jim talk about traveling through through time, discussing relativity and, in particular, Kurt Goedel's solution for closed timelike curves in General Relativity.
6.11.2017 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

Stochastic Resonance Energy Harvesting

Randy tells Jim about ways in which external vibrations can be used to do useful work in large-scale devices. These processes look at have happens when bistable systems (e.g., a bent cantilever) are subjected to random forcing from the environment. ...
6.11.2017

Stochastic Resonance Energy Harvesting

Randy tells Jim about ways in which external vibrations can be used to do useful work in large-scale devices. These processes look at have happens when bistable systems (e.g., a bent cantilever) are subjected to random forcing from the environment.
21.10.2017 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

Five Proven Methods of Levitation

Randy shows Jim five different ways in which a body can be levitated: by magnetism, by superconductors, by Lenz' Law, by acoustics, and most recently by thermophoresis. Show notes: http://frontiers.physicsfm.com/15
21.10.2017

Five Proven Methods of Levitation

Randy shows Jim five different ways in which a body can be levitated: by magnetism, by superconductors, by Lenz' Law, by acoustics, and most recently by thermophoresis.
4.10.2017 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

Stochastic Electrodynamics

Randy explains Stochastic Electrodynamics to Jim, the theory that vacuum fluctuations are the cause of quantum mechanical behavior. Show notes: http://frontiers.physicsfm.com/14
4.10.2017

Stochastic Electrodynamics

Randy explains Stochastic Electrodynamics to Jim, the theory that vacuum fluctuations are the cause of quantum mechanical behavior.
14.09.2017 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

Exotic Photon Trajectories in Quantum Mechanics

Jim and Randy discuss strange trajectories observed in triple slit experiments with metallic plates. Photons seem to pass through one slit, come back through the middle slit, and out the third due to their interactions with surface plasmons. There ar...
14.09.2017

Exotic Photon Trajectories in Quantum Mechanics

Jim and Randy discuss strange trajectories observed in triple slit experiments with metallic plates. Photons seem to pass through one slit, come back through the middle slit, and out the third due to their interactions with surface plasmons. There ar...
20.08.2017 https://assets.podomatic.net/ts/54/18/75/physicsfrontiers-rantschler/pro/1400x1400_11765087.jpg

A Gravitational Arrow of Time

Jim and Randy discuss a cosmological theory that purports to find an explanation for the arrow of time in gravitational theory based on the shape and distribution of matter and how it evolves. Show notes: http://frontiers.physicsfm.com/12
20.08.2017

A Gravitational Arrow of TIme

Jim and Randy discuss a cosmological theory that purports to find an explanation for the arrow of time in gravitational theory based on the shape and distribution of matter and how it evolves.