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quantum information theory

2020 in Review

The Year in Math and Computer Science

December 23, 2020

Even as mathematicians and computer scientists proved big results in computational complexity, number theory and geometry, computers proved themselves increasingly indispensable in mathematics.

Illustration of a black hole
Hidden Structure

The Most Famous Paradox in Physics Nears Its End

October 29, 2020

In a landmark series of calculations, physicists have proved that black holes can shed information.

Animated illustration of a hand emerging from a black hole, while drawing the black hole by connecting dots flashing 0 and 1.
Quantized Columns

Spotting Quantum Black Holes in the Lab

July 15, 2020

Can we test speculations about how quantum physics affects black holes and the Big Bang?

theoretical physics

Does Time Really Flow? New Clues Come From a Century-Old Approach to Math.

April 7, 2020

The laws of physics imply that the passage of time is an illusion. To avoid this conclusion, we might have to rethink the reality of infinitely precise numbers.

Animation showing toy-like depictions of computer science, quantum mechanics and pure math affecting each other.
computational complexity

Landmark Computer Science Proof Cascades Through Physics and Math

March 4, 2020

Computer scientists established a new boundary on computationally verifiable knowledge. In doing so, they solved major open problems in quantum mechanics and pure mathematics.

Illustration of black holes connected by a wormhole.
quantum information theory

Wormholes Reveal a Way to Manipulate Black Hole Information in the Lab

February 27, 2020

A proposal for building wormhole-connected black holes offers a way to probe the paradoxes of quantum information.

Photos of Google’s quantum computer system on the left, IMB’s supercomputer Summit on the right.
Abstractions blog

Google and IBM Clash Over Milestone Quantum Computing Experiment

October 23, 2019

Today Google announced that it achieved “quantum supremacy.” Its chief quantum computing rival, IBM, said it hasn’t. The disagreement hinges on what the term really means.

Quantized Columns

Why I Called It ‘Quantum Supremacy’

October 2, 2019

Researchers finally seem to have a quantum computer that can outperform a classical computer. But what does that really mean?

Stephanie Wehner in a red suit standing in a glass-paneled corridor at Delft University of Technology in the Netherlands. Her reflection appears in the glass to the right and left.
Q&A

To Invent a Quantum Internet

September 25, 2019

Fifty years after the current internet was born, the physicist and computer scientist Stephanie Wehner is planning and designing the next internet — a quantum one.