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Which quantum computer is the most powerful ever? It's complicated

IonQ has become the latest company to claim its quantum computer is more powerful than any other computer in existence - despite not having built it yet. But how exactly do you benchmark a quantum computer?

Analysis

A simulation of gravity showing curved space-time. The ball represents the sun and is resting on a sheet of plastic that stretches under its weight. The curved sheet of plastic demonstrates the way a gravity curves space.

Physics

The massive problem of trying to fully explain what mass actually is

Comment

Technology

Microsoft says its weird new particle could improve quantum computers

News

An employee among mining rigs at the Evobits crypto farm in Cluj-Napoca, Romania

Technology

Quantum computers could slash the energy use of cryptocurrencies

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Technology

IBM quantum computer beat a supercomputer in a head-to-head test

News

Extremely cold drop of helium can be levitated forever

Physics

Extremely cold drop of helium can be levitated forever

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Quantum computers could be built that are based on sound

Physics

Sound-based quantum computers could be built using chip-sized device

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The are thosands of small pieces of junk orbiting Earth (as well as thousands of satellites)

Physics

Quantum sensors could detect space debris from its gravitational pull

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Sunlight coming out of the optical fibre

Physics

Sunlight could cool an atom to its coldest possible temperature

News

Technology

'Fluxonium’ is the longest lasting superconducting qubit ever

A fluxonium qubit can keep its most useful quantum properties for about 1.48 milliseconds, drastically longer than similar qubits currently favoured by the quantum computing industry

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Physics

Fundamental law of physics demonstrated using quantum objects

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Technology

Sound vibrations can encode and process data like quantum computers do

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Physics

AI can work out how quantum computers stack up to one another

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Space

A distant supernova defies our understanding of the cosmos’s expansion

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