ABOUT THE FQXi PODCAST

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 podcast@fqxi.org, and follow us on twitter: @FQXi. The podcast is produced by Zeeya, and music is provided by Baltimore-based Diefenbaker.

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 podcast@fqxi.org, and follow us on twitter: @FQXi. The podcast is produced by Zeeya, and music is provided by Baltimore-based Diefenbaker.

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RECENT ARTICLES

*click titles to read articles*

**Can Choices Curve Spacetime?**

Two teams are developing ways to detect quantum-gravitational effects in the lab.

**The Quantum Engine That Simultaneously Heats and Cools **

Tiny device could help boost quantum electronics.

**The Quantum Refrigerator**

A tiny cooling device could help rewrite the thermodynamic rule book for quantum machines.

**Time to Think**

Philosopher Jenann Ismael invokes the thermodynamic arrow of time to explain how human intelligence emerged through culture.

**Lockdown Lab Life**

Grounded physicists are exploring the use of online and virtual-reality conferencing, and AI-controlled experiments, to maintain social distancing. Post-pandemic, these positive innovations could make science more accessible and environmentally-friendly.

RECENT ARTICLES

Two teams are developing ways to detect quantum-gravitational effects in the lab.

Tiny device could help boost quantum electronics.

A tiny cooling device could help rewrite the thermodynamic rule book for quantum machines.

Philosopher Jenann Ismael invokes the thermodynamic arrow of time to explain how human intelligence emerged through culture.

Grounded physicists are exploring the use of online and virtual-reality conferencing, and AI-controlled experiments, to maintain social distancing. Post-pandemic, these positive innovations could make science more accessible and environmentally-friendly.

PODCAST

May 17, 2021

Complete Podcast

The FQXi **December 24, 2019** Podcast features:

- Schrödinger Squared

INFO: **MP3 file / 57 minutes / 60 MB**

LISTEN:

Featured video in this podcast:

Individual Stories

Schrödinger Squared

An amped up version of the Schrodinger Cat Paradox spells trouble for all quantum interpretations -- according to its architect Renato Renner. He tells Zeeya and Brendan how the controversial thought experiment works, and why he thinks it is bad news for fans of Many Worlds and quantum parallel universes, QBism, Collapse models and (less so) for Bohmian interpretations of quantum mechanics. But not everyone agrees.

INFO: **MP3 file / 57 minutes / 60 MB**

LISTEN:

RELATED LINKS:

*Nature Communications:*Paper by Frauchiger and Renner*FQXi blog:*Watching the Watchmen--George Musser implements a quantum circuit to test the Frauchiger-Renner paradox*FQXi video:*Modelling Physical Agents with a Quantum Computer, by Lidia del Rio*Nature News:*Reimagining of Schrödinger Cat Breaks Physics

PODCAST ARCHIVE

- Information as Fuel

- The Disordered Cosmos

- 2020: Year in Physics Review Part 2

- 2020: Year in Physics Review Part 1

- Strike For Black Lives
- Retrocausality Reviewed
- Measuring Consciousness in Fruit Flies
- Superior
- Monster Galaxy

- 2019: Year in Physics Review Part 2

- 2019: Year in Physics Review Part 1

- Quantum Supremacy Milestone?

- Quantum Mind Reading -- Adam Brown

- Downward Causation -- George Ellis

- Designing the Mind -- Susan Schneider

View All Archived Podcasts

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JOHN R. COX wrote on January 13, 2020

George,

We shouldn't conflate contradiction with inconsistency. QM has a dynamic track record not only of prediction in application to specific tasks, but also in discovery. Its worth noting that where we have seen discovery in QM it has been by theoretical regimes which are quasi-Relativistic, ie: inverse square law subject to Lorentz Invariance.

The question posed by Frauchiger and Renner, does contend inconsistency. But all the underpinning of QM parameters are classical laws...

George,

We shouldn't conflate contradiction with inconsistency. QM has a dynamic track record not only of prediction in application to specific tasks, but also in discovery. Its worth noting that where we have seen discovery in QM it has been by theoretical regimes which are quasi-Relativistic, ie: inverse square law subject to Lorentz Invariance.

The question posed by Frauchiger and Renner, does contend inconsistency. But all the underpinning of QM parameters are classical laws...

JOHN R. COX wrote on January 13, 2020

Georgi,

by and large I agree. Near the end of the discussion panel, Aaronson summed it as what is proven is that we can prove QM is a theory. The 'why' that it works is omething that goes to vast numbers of events in the simplest macroscopic thing. A mature Maple tree in my neighborhood might produce 30,000 leaves in a season, yet there is still a small area way up in the wind where a few, scattered, dead leaves cling to their twigs in January. What are the odds of that, and what odds of...

Georgi,

by and large I agree. Near the end of the discussion panel, Aaronson summed it as what is proven is that we can prove QM is a theory. The 'why' that it works is omething that goes to vast numbers of events in the simplest macroscopic thing. A mature Maple tree in my neighborhood might produce 30,000 leaves in a season, yet there is still a small area way up in the wind where a few, scattered, dead leaves cling to their twigs in January. What are the odds of that, and what odds of...

GEORGINA WOODWARD wrote on January 13, 2020

Thanks for taking the time John. By 'relying on what they are sent' I mean what I think you are referring to as the 'classical record'.

Right now I'm thinking you can't make silk purse out of a sows ear. It starts out with quantum correlations and uses quantum maths and quantum explanations and ends up with something unexpected. I'm not sure if it is a true paradox, an*impossibility* (most likely indicating something wrong with the theory) or just what you get if you follow the...

Thanks for taking the time John. By 'relying on what they are sent' I mean what I think you are referring to as the 'classical record'.

Right now I'm thinking you can't make silk purse out of a sows ear. It starts out with quantum correlations and uses quantum maths and quantum explanations and ends up with something unexpected. I'm not sure if it is a true paradox, an

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