Quantum ‘arrow of time’ suggests early universe had no entanglement

In the beginning, there was no quantum entanglement. That is the conclusion of a study exploring the so-called entanglement past hypothesis. The finding is part of a quantum reinvention of our notions about why time only flows in one direction.

When two particles become entangled, each can no longer be thought of as an independent object – their properties are tied together, even if they are physically far apart. However, unless these particles are perfectly isolated from the environment, outside interference…