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Quantum gravity

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Wormhole Experiment Called Into Question

March 23, 2023

Last fall, a team of physicists announced that they had teleported a qubit through a holographic wormhole in a quantum computer. Now another group suggests that’s not quite what happened.

Black Holes Will Eventually Destroy All Quantum States, Researchers Argue

March 7, 2023

New calculations suggest that the event horizons around black holes will ‘decohere’ quantum possibilities — even those that are far away.

How Our Reality May Be a Sum of All Possible Realities

February 6, 2023

Richard Feynman’s path integral is both a powerful prediction machine and a philosophy about how the world is. But physicists are still struggling to figure out how to use it, and what it means.

The Year in Physics

December 22, 2022

In a year filled with sweet new observations in astronomy and tantalizing breakthroughs in condensed matter physics, the brand-new space telescope takes the cake.

Physicists Create a Holographic Wormhole Using a Quantum Computer

November 30, 2022

The unprecedented experiment explores the possibility that space-time somehow emerges from quantum information.

A Black Hole’s Orbiting Ring of Light Could Encrypt Its Inner Secrets

September 8, 2022

Physicists have discovered that the ring of photons orbiting a black hole exhibits a special kind of symmetry, hinting at a deeper meaning.

Where Do Space, Time and Gravity Come From?

May 4, 2022

Einstein’s description of curved space-time doesn’t easily mesh with a universe made up of quantum wavefunctions. Theoretical physicist Sean Carroll discusses the quest for quantum gravity with host Steven Strogatz.

Q&A

Pondering the Bits That Build Space-Time and Brains

April 20, 2022

Vijay Balasubramanian investigates whether the fabric of the universe might be built from information, and what it means that physicists can even ask such a question.

A New Tool for Finding Dark Matter Digs Up Nothing

March 21, 2022

Physicists are devising clever new ways to exploit the extreme sensitivity of gravitational wave detectors like LIGO. But so far, they’ve seen no signs of exotica.

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