Everyday life on the internet is insecure. Hackers can break into bank accounts or steal digital identities. Driven by AI, attacks are becoming increasingly sophisticated. Quantum cryptography ...

Researchers have designed a new device that can efficiently create multiple frequency-entangled photons, a feat that cannot be achieved with today's optical devices. The new approach could open a path ...

Light is usually treated as something simple, a clean beam that either shines or does not. At the quantum level, however, every beam is a crowd of individual photons, and even tiny imperfections in ...