The proof, known to be so hard that a mathematician once offered 10 martinis to whoever could figure it out, connects quantum ...

Quantum entanglement, a bewildering phenomenon where particles become interconnected regardless of the distance separating them, challenges our fundamental understanding of reality. It has puzzled ...

Quantum theory based only on real numbers fails to explain the results of two new experiments.

Google has launched a quantum computing chip called Willow that is said to reduce errors exponentially. Willow was able to solve a complex mathematical problem in just five minutes — a task that ...

Do full-fledged quantum computers already exist, or will it be a decade before they come into being? The answer is fuzzy.