Scientists have observed how quantum superpositions build up in a helium atom within femtoseconds. Just like in the famous double-slit experiment, there are two ways to reach the final outcome. It is ...

One reason to test ever larger Schrödinger’s kittens is they might show us that quantum mechanics itself breaks down before ...

A team of physicists experimentally produces quantum-superpositions, simply using a mirror. Standing in front of a mirror, we can easily tell apart ourselves from our mirror image. The mirror does not ...

Killing horizon: a thought experiment suggests that the presence of a black hole can decohere a quantum superposition. (Courtesy: Shutterstock/Rost9) A new thought experiment suggests that the mere ...

A new study suggests that time itself could exist in a quantum superposition, ticking faster and slower simultaneously, and that this effect may soon be tested in the lab. Led by Igor Pikovski at ...

One of the great challenges for quantum physicists is to find quantum behaviour in macroscopic objects. There are obvious examples of quantum behaviour on a large scale, such as superconductivity and ...