Thus far, the search for extraterrestrial intelligence (SETI) has used strategies based on classical science—listening for radio waves, telescopes watching for optical signals, telescopes in orbit ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Quantum mechanics and classical physics don’t always get along, and can sometimes form apparent paradoxes ...

(via Sabine Hossenfelder) Physicists have come up with a new experiment to test the quantum twin paradox using a pair of atoms in a superposition. It's an interesting idea because it could tell us ...

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More generally, a quantum system can be in a superposition of states, where “state” can refer to other properties, such as the spin of a particle. Much of the Frauchiger-Renner thought experiment ...

A carefully designed experiment uses Hardy’s paradox to illustrate lack of local realism. Hardy’s 30-year-old thought exercise has led many researchers to chip away at real versions. If the universe ...

For more than a decade, physicists have argued (and counter-argued) that a subatomic particle can be separated from certain quantum properties, such as its spin—a phenomenon known as the Cheshire cat ...

Quantum computers—devices that process information using quantum mechanical effects—have long been expected to outperform classical systems on certain tasks. Over the past few decades, researchers ...

Physicist Paul Davies looks back at the past century of quantum mechanics—the most disruptive theory in the history of modern science.