Quantum computing

When checking that solutions to certain problems are correct, it turns out, you can’t get around the inherent complexity of the quantum world.

Do we need quantum computers to fully understand complex chemical reactions? A new result, decades in the making, shows the surprising power of ordinary “classical” machines.

Two research groups say they have significantly reduced the amount of qubits and time required to crack common online security technologies.

Henry Yuen is developing a new mathematical language to describe problems whose inputs and outputs aren’t ordinary numbers.

“Anomalous” heat flow, which at first appears to violate the second law of thermodynamics, gives physicists a way to detect quantum entanglement without destroying it.

Recent progress on both analog and digital simulations of quantum fields foreshadows a future in which quantum computers could illuminate phenomena that are far too complex for even the most powerful supercomputers.

In theory, quantum physics can bypass the hard mathematical problems at the root of modern encryption. A new proof shows how.

The catch: It would require the energy of a few medium-size stars.

Physicists recently mapped the hidden shape that underlies the quantum behaviors of a crystal, using a new method that’s expected to become ubiquitous.