Thoughtful woman lying on leaves, gazing upwards with autumn background.

Daydreaming Clears an AI’s False Memories, Even With Lopsided Data

A brain-inspired memory network fed heavily skewed patterns can look like it is recalling something when it is only agreeing with the majority. Rewriting the learning rule so it tracks each neuron’s departure from its own average restored recall at every bias level the researchers tested.

Using a new cone-shaped solar concentrator, researchers showed that sunlight can be used to create entangled photons. This could one day enable satellites to create secure encryption keys using the sunlight already abundant in space.

Sunlight Can Generate Quantum Entanglement, No Laser Required

Physicists funneled concentrated sunlight into a nonlinear crystal and pulled out polarization-entangled photon pairs, the first entanglement ever measured from a sunlight-pumped source. The pairs violated Bell’s inequality, showing that lasers are optional for quantum light.