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Physics Frontiers

Physics Frontiers

Episode 77: Maxwellian Ratchets with Alex Jurgens

Sun, 31 Mar 2024

Jim talks with Alex Jurgens about Maxwellian ratchets, automata that are similar to Maxwell's Demon.  They talk about their implications for information processing and entropy.

Episode 76: Undeciability and Theories of Everything with Claus Kiefer

Mon, 29 Jan 2024

Jim talks with Claus Kiefer about the implications of Goedel's incompleteness theorems on the search for the theory.

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Episode 75: Categorical Probability and the Measurement Problem

Sun, 20 Aug 2023

Jim talks with Nick Ormrod and V. Vilasini about their use of categorical probability theory to analyze the measurement problem.  We discuss categorical probability theory, which allows them to abstract from particular mathematical formulations of quantum mechanics to more general ideas about states and measurements and observers than found in Hilbert space formulations.  They use this to look at the various properties of quantum mechanics and how they relate to each other, in particular how relativity affects the measurement problem.

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Episode 74: Stochastic Thermodynamics with David Wolpert

Sun, 09 Jul 2023

Jim talks with David Wolpert about the non-equilibrium behavior of computation, what it means for entropy, and how it relates to traditional thermodynamics.

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Episode 73: Quantum Money with Jiahui Liu

Sun, 18 Jun 2023

Jim discusses quantum money with Jiahui Liu.  Quantum money is a linchpin of quantum cryptography.  The ability to create secure banknotes using quantum computers would allow even more secure methods of encryption for communications. 

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