Theoretical physicists studying quantum fields in curved spacetime have built a growing body of calculations showing that ...

Quantum mechanics has always had a way of making even the sharpest minds stop and scratch their heads. In the everyday world, you expect objects to follow straightforward rules. A ball thrown into the ...

Classical and quantum mechanics don’t really get along as the science of the subatomic can get, well, weird. Take, for instance, quantum entanglement, which says that the state of one particle can be ...

Stephen Hawking’s paradoxical finding that black holes don’t live forever has profound, unresolved implications for the quest for unifying theories of reality. In essence, what Hawking, who died six ...

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 ...

Faster-than-light particles have spent decades in physics as both temptation and warning. They offered a way to test the ...

In 1935, Austrian-born physicist Erwin Schrödinger described a thought experiment that magnified a glaring problem at the heart of quantum mechanics. To this day, the problem remains, summed up by ...

For 50 years, physicists have been toiling with ways to solve the “black hole information paradox”—the idea that black holes seem to destroy information, even thought that is an impossibility ...