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Physics

Why exactly is the quantum world so weird?

We can describe the quantum realm using straightforward mathematics – but once we try to translate these ideas into the real world, things get weird. Our quantum columnist Karmela Padavic-Callaghan explains why

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Physics

Physicists capture a strange fractal ‘butterfly’ for the first time

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Physics

Time can move both forwards and backwards at the quantum scale

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Technology

Microsoft has a new quantum computer – but does it actually work?

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When did time begin? Hint: It wasn’t at the big bang

Space

When did time begin? Hint: It wasn’t at the big bang

Features

Technology

China launches hunt for ways to protect data from quantum computers

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Futuristic battery

Technology

Quantum batteries charge faster the larger they are

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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.

Technology

Why AI firms should follow the example of quantum computing research

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Technology

Cybersecurity experts fear Elon Musk's DOGE may enable quantum hackers

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Technology

Why quantum computers are being held back by geopolitical tussles

Fears that other nations could gain an advantage are holding back the development of quantum computers, with export controls and other restrictions making it harder for researchers to work across borders

Analysis

Technology

How the megaquop machine could usher in a new era of quantum computing

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Technology

Quantum computers have finally arrived, but will they ever be useful?

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Technology

How PsiQuantum plans to build world's largest quantum computer by 2027

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Technology

AI chip smaller than a grain of salt uses light to decode data

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