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.

RECENT FORUM POSTS

**Lorraine Ford**: "Tom, Re What is science, and how can it work when all information is..."
*in* Your Invitation to FQXi's...

**Amrit Sorli**: "rate of clocks is different bacause of diferent density of quantum vacuum...."
*in* Time Dilation Gets a...

**Amrit Sorli**: "there is no time dilatation at al, time cannot dilate as time is not..."
*in* Time Dilation Gets a...

**Joy Christian**: "We have had some discussion about the "Quantum Cheshire Cat" here."
*in* The Quantum Pet Store:...

**John Merryman**: "Tom, Possibly it might be better described as "anthropocentric," since..."
*in* Why Quantum?

**Zeeya Merali**: "The latest edition of the podcast is up -- and you may notice there's a bit..."
*in* The Quantum Pet Store:...

**Thomas Ray**: "John, I don't see any connection of the second question to the first."
*in* Why Quantum?

**dieu le**: "The light pulse’s activity of reflecting back and forth between two..."
*in* Alternative Models of...

RECENT ARTICLES

*click titles to read articles*

**Quantifying Occam**

Is the simplest answer always the best? Connecting Medieval monks to computational complexity, using the branch of mathematics known as category theory.

**Heart of Darkness**

An intrepid physicist attempts to climb into the core of black hole.

**Why Quantum?**

Entropy could explain why nature chose to play by quantum rules.

**Reality's NeverEnding Story**

A quantum version of Darwinian natural selection could enable the universe to write itself into being.

**The Quantum Dictionary**

Mark Van Raamsdonk is re-writing how we define the shape of our universe. Can such translations help to unite quantum theory and gravity?

RECENT ARTICLES

Is the simplest answer always the best? Connecting Medieval monks to computational complexity, using the branch of mathematics known as category theory.

An intrepid physicist attempts to climb into the core of black hole.

Entropy could explain why nature chose to play by quantum rules.

A quantum version of Darwinian natural selection could enable the universe to write itself into being.

Mark Van Raamsdonk is re-writing how we define the shape of our universe. Can such translations help to unite quantum theory and gravity?

Complete Podcast

The FQXi **August 31, 2014** Podcast features:

- Watching Quantum Cats Die
- Black Hole Fireworks
- Quantifying Occam
- Quantum Pigeonhole Principle
- Quantum Cheshire Cat

INFO: **MP3 file / 48 minutes / 46 MB**

LISTEN:

Featured video in this podcast:

Individual Stories

Watching Quantum Cats Die

Physicist Andrew Jordan describes experiments to monitor and steer Schrodinger's metaphorical cat as it is dying, allowing for a new level of quantum control.

INFO: **MP3 file / 9 minutes / 9 MB**

LISTEN:

RELATED LINKS:

*Nature:*Paper by Weber et al*UC Berkeley:*Watching Schrodingers Cat Die

Black Hole Fireworks

The theory of Loop Quantum Gravity predicts that black holes will become white holes, spewing out all their swallowed matter, when they die. Physicist Carlo Rovelli explains his analysis.

INFO: **MP3 file / 12 minutes / 11 MB**

LISTEN:

RELATED LINKS:

*arXiv:*Paper by Haggard & Rovelli*FQXi podcast:*Jorge Pullin on Black Hole Singularities*Nature News:*Quantum bounce could make black holes explode*FQXi article:*Time at the Event Horizon

Quantifying Occam

Is the simplest scientific explanation always the best? Computer scientist Noson Yanofsky investigates using category theory -- as he explains to reporter Sophie Hebden.

INFO: **MP3 file / 11 minutes / 11 MB**

LISTEN:

RELATED LINKS:

*FQXi article:*Profile of Noson Yanofsky*FQXi article:*The Art of Math: Category Theory*FQXi article:*The Quantum Linguist

Quantum Pigeonhole Principle

Physicist Jeff Tollaksen describes the theory behind a new kind of correlation that is even spookier than entanglement, and illustrates it with pigeons.

INFO: **MP3 file / 13 minutes / 12 MB**

LISTEN:

RELATED LINKS:

*arXiv:*Paper by Aharonov et al*Science News:*You Should Not Try to Pigeonhole Physics*FQXi video:*Jeff Tollaksen on Quantization

Quantum Cheshire Cat

Podcast Extra: Quantum experiments separate the properties of a neutron so that its mass travels in one direction while its magnetic moment moves in another. Jeff Tollaksen discusses.

INFO: **MP3 file / 9 minutes / 9 MB**

LISTEN:

RELATED LINKS:

*Nature Communications:*Paper by Denkmayr et al*BBC:*Quantum Cheshire Cat Becomes Reality*FQXi video:*Jeff Tollaksen on a New Approach to Quantum Mechanics

PODCAST ARCHIVE

- Time Travel Simulated in the Lab
- BICEP2 Under Scrutiny
- Higgs the Destroyer
- Why is Nature Quantum?

- BICEP2 & Inflation
- BICEP2 & Alternative models
- Thermal Gravity
- Entangling Spacetime

- A Matter of Consciousness

- Sean Carroll Fluctuates on Floating Consciousnesses

- What is quantum information *really* good for? -- FQXi Conference Panel Discussion

- The Year in Physics: 2013 Review Part III
- Ancient Aliens

- The Year in Physics: 2013 Review Part II
- Taking the LHC to Africa

- The Year in Physics: 2013 Review Part I
- Alien Hunter

- Bye Bye Big Bang?
- Dark Energy Survey Launches
- Voyager 1 Leaves the Solar System
- Quantum Space Tests
- Superposition

- Experimental Proof for Parallel Universes?
- Multiversality -- Full Interview with Frank Wilczek
- Neutrinos Shift Personality
- Certainty About the Uncertainty Principle
- Plants Do Math!

- Cloaking Time
- The Reality of Time
- Bye Bye Black Hole Singularities!
- Entangling the Dead

- Astro Results, Cosmic Conclusions
- Dark Energy Discovery
- DNA Computing

- Averting an Asteroid Apocalypse
- Our Unstable Universe
- Let There Be Light
- Quantum Roots of Photosynthesis

- Is God a Good Theory?
- Quantum Birds
- The Cosmic Clock Ambiguity

- The Year in Physics: 2012 Review
- Time & the String Multiverse
- The Building Blocks of Spacetime

- Testing the Quantum Limits
- Illusions of Time and the Self
- Unraveling Paradoxes

- Uncertainty about Quantum Uncertainty
- The Holographic Universe
- Jiggling Atoms

- Parallel Worlds, Parallel Beliefs
- The Ignominious History of the Higgs
- Discord in Quantum Computing
- Faster Than Light Cosmology

- The Higgs Goes to Ghana
- The Illusion of Time & The Dynamics of Shapes
- Mental Time Travel

- Knots in Space
- Predicting the End of Civilization
- The Quantum Fuel of Time Travel

- Did the Universe Have a Beginning?
- Launching the FQXi Essay Contest
- Quantum Words & Pictures
- The Secret (Quantum) Science of Scents
- Ask a Physicist: Strings & Sounds

- Splitting the Electron
- Neural Relativity
- Table-Top Tests for Quantum Gravity

- Time Twisting Tests
- Not So Fast Neutrinos
- The Sound of Physics