Einstein said that the wave function does not describe the physical state of a single object, but the possible states of an ensemble. He also said that quantum mechanics is not complete; there must be ...

Quantum mechanics is a weird thing. It says that we can never really know all there is about reality. If we measure a particle, we can't know its exact momentum and position at the same time. If we ...

Astronomers propose an experiment that may close the last major loophole of Bell's inequality -- a 50-year-old theorem that, if violated by experiments, would mean that our universe is based not on ...

In a paper published this week in the journal Physical Review Letters [preprint: http://arxiv.org/abs/1310.3288], MIT researchers propose an experiment that may close ...

For more than 60 years, Bell's theorem has been the gold standard for demonstrating that quantum mechanics defies the rules ...

Fifty years ago, Belfast scientist John Stewart Bell proved Albert Einstein wrong. Bell is regarded as one of the 20th Century's greatest physicists, and was widely believed to have been in line for a ...