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Physics

Ultra-secure quantum data sent over existing internet cables

Two commercial telecommunications facilities have been connected by a secure quantum network that used existing fibre optic cables at room temperature – a key step towards a feasible quantum internet

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Technology

We can build quantum computers using the rules of special relativity

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Technology

Quantum batteries could make quantum computers more efficient

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Technology

Quantum GPS can help planes navigate when regular GPS is jammed

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Technology

A classic hacking technique works on some quantum computers

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Abstract prism of light references quantum properties

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Five physicists discuss the achievements and future of quantum theory

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Earth

Ancient humans may have faced radiation risk 41,000 years ago

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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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Black Mirror returns full of delights and disappointments

Culture

2G4A579 3D visualization of gravity distorsion, physical objects in orbit, space, general theory of relativity, law of universal gravitation, scientific

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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Environment

Lab-grown chicken could be made chewier using artificial capillaries

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Physics

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

Features

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?

Features