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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.

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鈥檚 celebrate its power and provocation

Quantum theory started with a bout of hay fever, and went on to transform our view of the universe 鈥� but its legacy isn't complete

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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 Schr枚dinger鈥檚 cat came from 鈥� and why it鈥檚 getting fatter

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Physics

Speculative novel layers Groundhog Day with existential dreaminess

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Qubit, abstract illustration.

Physics

Space could emerge from time

An investigation of the changing behaviour of a single quantum bit through time has uncovered a tantalising similarity to the geometry of three-dimensional space

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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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Physics

How nothing could destroy the universe

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