When atoms collide, their exact structure—for example, the number of electrons they have or even the quantum spin of their ...

What makes something quantum? This question has kept a small but dedicated fraction of the world's population—most of them ...

Quantum calculations amount to sophisticated estimates. But in 1931, Hans Bethe intuited precisely how a chain of particles ...

These were the laws of quantum mechanics, and they got their name from ... Niels Bohr pulled it into his description of how an atom worked. He said that electrons traveling around a nucleus ...

Did these researchers truly just crack our fundamental concepts of (quantum) physics wide open ... in the photonic energy getting absorbed by an atom, boosting the energy state of its electron ...

Quantum Mechanics is a strange world, indeed. Everyday things that we take for granted, things like cause-and-effect and elementary classical laws do not work in the world inside the atom.

The Standard Model extends the principles of quantum mechanics—which describes nature ... In 1913, Neils Bohr proposed that electrons in an atom orbit the nucleus in discrete energy levels.

To begin with, there’s no single quantum theory. There’s quantum mechanics, the basic mathematical ... of the nucleus at the heart of the atom; and the weak nuclear force, which explains ...

Quantum mechanics is the study of the dynamics of particles at its most fundamental level. The state of a particle, such as its position or momentum, is described by a statistical distribution ...

Invented in 1991, atom interferometers take advantage of superposition, a fundamental principle in quantum mechanics that a ... After testing the model in simulations, Kovachy's team built the ...