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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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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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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

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

Physics

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

Features

Could the ancient Greeks have invented quantum theory?

Physics

Could the ancient Greeks have invented quantum theory?

There were hints that the world may be quantum long before the development of quantum mechanics in 1925 – could we have come up with this revolutionary theory hundreds or even thousands of years earlier?

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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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