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quantum gravity

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Illustration of an astronaut opening a black hole to see another astronaut inside.
theoretical physics

New Calculations Show How to Escape Hawking’s Black Hole Paradox

By Charlie Wood
August 2, 2023
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Inside of a black hole, the two theoretical pillars of 20th-century physics appear to clash. Now a group of young physicists think they have resolved the conflict by appealing to the central pillar of the new century — the physics of quantum information.

The Joy of Why

Does Nothingness Exist?

By Steven Strogatz
July 26, 2023
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Even empty space bubbles with energy, according to quantum mechanics — and that fact affects almost every facet of physical reality. The theoretical physicist Isabel Garcia Garcia explains to Steven Strogatz why it’s so important in modern physics to understand what a true vacuum is.

Q&A

The Physicist Who’s Challenging the Quantum Orthodoxy

By Thomas Lewton
July 10, 2023
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For decades, physicists have struggled to develop a quantum theory of gravity. But what if gravity — and space-time — are fundamentally classical?

A photo illustration showing a research station in Antarctica with a map plotting neutrinos’ arrival directions imprinted on the sky.
astrophysics

A New Map of the Universe, Painted With Cosmic Neutrinos

By Thomas Lewton
June 29, 2023
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Physicists finally know where at least some of these high-energy particles come from, which helps make the neutrinos useful for exploring fundamental physics.

An illustration of a black hole made out of computer circuits.
quantum information theory

In New Paradox, Black Holes Appear to Evade Heat Death

By George Musser
June 6, 2023
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The puzzling behavior of black hole interiors has led researchers to propose a new physical law: the second law of quantum complexity.

Q&A

The Physicist Who Glues Together Universes

By Charlie Wood
May 25, 2023
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Renate Loll has helped pioneer a radically new approach to quantum gravity. She assumes that the fabric of space-time is a blend of all possible fabrics, and she has developed the computational tools needed to calculate the far-reaching implications of that assumption.

quantum gravity

Wormhole Experiment Called Into Question

By Charlie Wood
March 23, 2023
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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.

An illustration representing an eye at the center of a black hole, observing a quantum particle outside the black hole.
quantum gravity

Black Holes Will Eventually Destroy All Quantum States, Researchers Argue

By Thomas Lewton
March 7, 2023
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New calculations suggest that the event horizons around black holes will ‘decohere’ quantum possibilities — even those that are far away.

Illustration in which a bright red line results from many wavelike ripples overlapping.
explainers

How Our Reality May Be a Sum of All Possible Realities

By Charlie Wood
February 6, 2023
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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.


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