Quantum computing

Two teams have made photons act as if time were simultaneously flowing in two directions. The experiments demonstrate a way to potentially boost the performance of quantum devices.

Random circuit sampling, a popular technique for showing the power of quantum computers, doesn’t scale up if errors go unchecked.

Computer scientists this year learned how to transmit perfect secrets, why transformers seem so good at everything, and how to improve on decades-old algorithms (with a little help from AI).

A quantum approach to data analysis that relies on the study of shapes will likely remain an example of a quantum advantage — albeit for increasingly unlikely scenarios.

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

Lattice cryptography promises to protect secrets from the attacks of far-future quantum computers.

A team of physicists has entangled three photons over a considerable distance, which could lead to more powerful quantum cryptography.

Zero-knowledge proofs allow researchers to prove their knowledge without divulging the knowledge itself.

Two researchers have broken an encryption protocol that many saw as a promising defense against the power of quantum computing.