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The FQXi podcast brings you the latest ideas in foundational physics and cosmology—and includes interviews with our members and other leading scientists. It's hosted by Zeeya Merali and Brendan Foster. You can contact us at, and follow us on twitter: @FQXi. The podcast is produced by Zeeya, and music is provided by Baltimore-based Diefenbaker.

Malcolm Riddoch: "JBW: “The ‘measurement’ of a property does not ‘exist’ until a..." in Alternative Models of...

Al Schneider: "I have had this idea for some time and worked on it a lot over the years...." in Alternative Models of...

Peter Morgan: "Note that the author link,,..." in An algebraic approach to...

Zeeya Merali: "This is a place to discuss the article, "An algebraic approach to Koopman..." in An algebraic approach to...

Joe Fisher: "A visible person could dig or bore a fixed hole with visible sides in a..." in The Quantum Agent

Robert McEachern: "Eckard, I would argue that all symbolic representation (and thus all of..." in The Quantum Agent

Joe Fisher: "The most compelling evidence that the ability of white men of only being..." in Undecidability,...

Jack James: ""That is, instead of a world or physical laws, it is the local state of the..." in Could Consciousness Forge...

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The Quantum Agent
Investigating how the quantum measurement process might be related to the emergence of intelligence, agency and free will.

First Things First: The Physics of Causality
Why do we remember the past and not the future? Untangling the connections between cause and effect, choice, and entropy.

Can Time Be Saved From Physics?
Philosophers, physicists and neuroscientists discuss how our sense of time’s flow might arise through our interactions with external stimuli—despite suggestions from Einstein's relativity that our perception of the passage of time is an illusion.

A devilish new framework of thermodynamics that focuses on how we observe information could help illuminate our understanding of probability and rewrite quantum theory.

Gravity's Residue
An unusual approach to unifying the laws of physics could solve Hawking's black-hole information paradox—and its predicted gravitational "memory effect" could be picked up by LIGO.

February 22, 2020

Complete Podcast
The FQXi July 30, 2019 Podcast features:
  • Memory, Causality and Cats -- Sean Carroll
INFO: MP3 file / 24 minutes / 58 MB
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Individual Stories
Memory, Causality and Cats -- Sean Carroll
Cosmologist Sean Carroll is searching for a mathematical description of why causes precede effects and asking what makes our memories of the past special and different from calculations of what went before. Audio of a talk from the FQXi meeting in Tuscany.
INFO: MP3 file / 24 minutes / 58 MB
DOWNLOAD (right-click Windows, control-click Mac)
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Recent Comments

When you look at the world as a system, it is obvious that there is only one natural time-direction ratchet in the system, and that is quantum events.

When you look at the world as a system, it is obvious that the algorithmic cause of number change in quantum events is the driver of all other number change in the system via law of nature relationships.

But physics makes the mistake of thinking that a set of equations and numbers, without algorithmic drivers, constitutes a...

Here is a nice slide from Gu's talk that shows the superposition of precursors and outcomes. Note that time emerges from precursors and outcomes and so the past, present, and future all emerges from things that happen.

Things do not happen in a mostly empty space and time, but rather the notions of space and time emerge from things that happen...

You may not believe that precursors and their outcomes exist in quantum superpositions, but that is exactly what quantum reality means. Usually these superpositions are dephased rather quickly into a seeming determinate reality, but really there are unknowable quantum precursors...

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