Scientists test Einstein’s quantum challenge with one atom, directly measuring when photon paths erase interference stripes.

Several weeks ago I picked up “The Elegant Universe” because I thought it would have information on The Ultimate Theory. Soon afterwards, I picked up “How to Teach Physics To Your Dog” in order to get ...

An experiment measuring a single atom's recoil confirmed that observing a particle destroys interference, settling the ...

Thomas Young, born 250 years ago this week, was a polymath who made seminal contributions in fields from physics to Egyptology. But perhaps his most enduring legacy is proving Isaac Newton wrong about ...

Complementarity A new twist on the double-slit experiment. (Courtesy: Shutterstock/Andrey VP) One of the most counterintuitive concepts in physics – the idea that quantum objects are complementary, ...

The subtlest experiment in quantum mechanics is also one of the simplest: send a stream of particles through two openings in a barrier, and you’ll produce an interference pattern because the particles ...

Scientists observe unusual interference phenomena by scattering laser light from two atoms trapped inside an optical resonator. MPQ scientists observe unusual interference phenomena by scattering ...