Ultraprecise atomic clocks could test the idea that time moves at multiple speeds.

Add Yahoo as a preferred source to see more of our stories on Google. The Greenberger–Horne–Zeilinger (GHZ) paradox describes how quantum theory cannot be described by local realistic descriptions. A ...

Once a baffling theory, quantum mechanics has evolved into a driving force behind modern technology and frontier research.

Time already behaves strangely in modern physics. It can stretch, slow, and split depending on speed and gravity.

Over the last few years, optical atomic clocks have broken record after record in precision timekeeping. Atoms are cooled to ...

A new theory proposed by researchers at the Stevens Institute of Technology, Colorado State ...

Quantum theory is a mind-bending idea, suggesting that, at the subatomic level, particles can exist in multiple states at the same time. Scientists often give the example of physicist Erwin ...

Stephen Hawking's theory of black hole evaporation clashes with the laws of quantum mechanics. A new paper finds a way around this paradox, provided that the universe has seven dimensions.

Quantum theory and Einstein's theory of general relativity are two of the greatest successes in modern physics. Each works extremely well in its own domain: Quantum theory explains how atoms and ...