Quantum mechanics is one of the most successful theories in science — and makes much of modern life possible. Technologies ranging from computer chips to medical-imaging machines rely on the ...

A survey of Scientific American’s century of quantum coverage helps explain the enduring popularity of strange physics ...

Quantum mechanics is one of the most successful theories in science — and makes much of modern life possible. Technologies ranging from computer chips to medical-imaging machines rely on the ...

This year is the International Year of Quantum Science and Technology, according to UNESCO, marking 100 years since quantum mechanics was proposed. The theory hardly needed the extra publicity, though ...

Death is the inescapable conclusion of life. But what happens after death is still a highly debated topic. Throw into the mix a heady combination of religious belief and scientific theories, and you ...

Scientists have finally unlocked a way to identify the elusive W state of quantum entanglement, solving a decades-old problem ...

"No phenomenon is a real phenomenon until it is an observed phenomenon." — John Archibald Wheeler We used to think the observer was a passive witness to the universe. What if the observer is part of ...

Can two versions of reality exist at the same time? Physicists say they can — at the quantum level, that is.

Since the 1990s, evidence has been growing that quantum computers should be able to solve a range of particularly complex ...

Does quantum physics place limits on the extent to which we have free will? This long-debated question stems from the way different physicists interpret the mathematics of quantum theory, but now ...

Physicists at MIT recreated the double-slit experiment using individual photons and atoms held in laser light, uncovering the true limits of light’s wave–particle duality. Their results proved ...