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An artwork made my layering many paper cutouts, showing an astronaut near a black hole. Within the black hole are colourful swirls, stars and specks

Physics

Black hole entropy hints at a surprising truth about our universe

Two clashing ideas about disorder inside black holes now point to the same strange conclusions, and it could reshape the foundations of how we think about space and time

Features

A new understanding of causality could fix quantum theory’s fatal flaw

Physics

A new understanding of causality could fix quantum theory’s fatal flaw

Features

Physics

The forgotten women of quantum physics

Comment

Physics

Why no one can agree on what quantum physics really means

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Physics

Why John Stewart Bell has been haunting quantum mechanics for decades

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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

Leader

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?

Features

What does quantum theory really tell us about the nature of reality?

Physics

What does quantum theory really tell us about the nature of reality?

Features

How a quantum innovation may quash the idea of the multiverse

Physics

How a quantum innovation may quash the idea of the multiverse

The many-worlds interpretation of quantum mechanics invokes alternative realities to keep everything in balance. Has solving a century-old paradox now undermined their existence?

Features

Physics

Physicists in 2024 searched the quantum realm for the truth about time

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Physics

Quantum time crystals could be used to store energy

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Physics

Indestructible quantum rifts can exist in two places at once

News

Physics

Quantum theory is challenging long-standing ideas about entropy

News