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Physics

See the latest physics news and expert analysis on dark matter, the multiverse, theoretical and particle physics, quantum theory, and more from the world of physics.

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Physics

Why I still love reckoning with the quantum gravity problem

General relativity is an astonishingly beautiful theory, and grappling with why it disagrees with quantum mechanics is a joy, says Chanda Prescod-Weinstein

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Quantum computer circuitry illustration. Conventional computers store information as 'bits', with each transistor holding either a 1 or a 0. Quantum computers use quantum bits, or qubits, which operate according to two principles of quantum physics. One of the principles, supposition, allows a qubit to store a 1 and a 0 at the same time. This means two qubits can hold four values at once. The second principle, entanglement, means that the state of one qubit can depend on the state of another. As you expand the number of qubits, the machine becomes exponentially more powerful.

Physics

Quantum theory at 100: Let’s celebrate its power and provocation

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Physics

Where exactly does the quantum world end and concrete reality begin?

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Physics

Could the ancient Greeks have invented quantum theory?

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Physics

What exactly would a full-scale quantum computer be useful for?

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Physics

Carlo Rovelli on what we get wrong about the origins of quantum theory

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Physics

What does quantum theory really tell us about the nature of reality?

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Physics

A timeline of the most important events in quantum mechanics

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Physics

Where Schrödinger’s cat came from – and why it’s getting fatter

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Physics

Speculative novel layers Groundhog Day with existential dreaminess

Solvej Balle's newly translated speculative novel, On the Calculation of Volume (parts I and II), examines the numbing effects of time through the old trope of being stuck in a single day. It is an effective meditation

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Physics

Space could emerge from time

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Physics

How to make great coffee with fewer beans, according to science

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Physics

‘Quantum Darwinism’ may explain why we live in a shared reality

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Physics

How optical clocks are redefining time and physics

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