A new thought experiment suggests that the mere presence of a black hole can destroy a nearby quantum spatial superposition. Developed by physicists in the US, the experiment implies that the ...

Quantum mechanics describes the unconventional properties of subatomic particles, like their ability to exist in a ...

Quantum mechanics attempts to understand how the universe works on an atomic and subatomic level, and so far it turns out things get pretty weird down there. Take the concept of a superposition ...

Quantum superposition is a phenomenon in which a tiny particle can be in two states at the same time — but only if it is not being directly observed.

Two different groups have tested a seemingly counter-intuitive property of the quantum world: That it’s possible to put a photon, a particle of light, in a superposition of states going forward ...

Before we had experiments that revealed how atoms worked, we had no need for superposition, probabilities, measurement or anything else quantum-related. We just had normal physics.

Quantum superposition is the idea that particles exist in multiple states at once. When a measurement is performed, it is as if the particle selects one of the states in the superposition.

Let’s talk about quantum gravity experiments that can be done here on Earth! If we discover how to connect quantum mechanics with general relativity we’ll pretty much win physics. There are ...