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A representation of cubits. In this image, they look like fragile bubbles arranged in a grid. Each bubble has similar mathematical markings on it, but they each have an illuminated arrow in their center that’s pointing a different way.
quantum computing

New Codes Could Make Quantum Computing 10 Times More Efficient

By Charlie Wood
August 25, 2023
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Quantum computing is still really, really hard. But the rise of a powerful class of error-correcting codes suggests that the task might be slightly more feasible than many feared.

A spacecraft, laptop, QR code and CD
information theory

How Mathematical Curves Enable Advanced Communication

By Jordana Cepelewicz
September 19, 2022
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A simple geometric idea has been used to power advances in information theory, cryptography and even blockchain technology.

Illustration of two interweaving chains, one blue and one orange, against a blue background.
information theory

Qubits Can Be as Safe as Bits, Researchers Show

By Mordechai Rorvig
January 6, 2022
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A new result shows that quantum information can theoretically be protected from errors just as well as classical information can.

information theory

Researchers Defeat Randomness to Create Ideal Code

By Mordechai Rorvig
November 24, 2021
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By carefully constructing a multidimensional and well-connected graph, a team of researchers has finally created a long-sought locally testable code that can immediately betray whether it’s been corrupted.

Orange spheres representing quantum bits.
explainers

How Quantum Computers Will Correct Their Errors

By Katie McCormick
November 16, 2021
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Quantum bits are fussy and fragile. Useful quantum computers will need to use an error-correction technique like the one that was recently demonstrated on a real machine.

Art for "How Space and Time Could Be a Quantum Error-Correcting Code"
space-time

How Space and Time Could Be a Quantum Error-Correcting Code

By Natalie Wolchover
January 3, 2019
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The same codes needed to thwart errors in quantum computers may also give the fabric of space-time its intrinsic robustness.

520px photo of Gil Kalai
The Future of Quantum Computing

The Argument Against Quantum Computers

By Katia Moskvitch
February 7, 2018
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The mathematician Gil Kalai believes that quantum computers can’t possibly work, even in principle.

Abstractions blog

How to Use a Sphere to Talk to Mars

By Kevin Hartnett
April 12, 2017
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To avoid garbled messages, mathematicians might translate them into geometric form.

Q&A

Quantum Computing Without Qubits

By Peter Byrne
January 22, 2015
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A quantum computing pioneer explains why the near future of quantum computation may lie in simulators, not general-purpose quantum machines.


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