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string theory

Representation of plasma

Physics

QBox theory may offer glimpse of reality deeper than quantum realm

Physicists have long suspected that there is a layer of physical reality beneath quantum theory and a new mathematical model unveils just how strange it might be

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UNITED STATES - NOVEMBER 26: Formally-attired audience sporting 3D glasses during opening night screening of film

Physics

Forget the multiverse. In the pluriverse, we create reality together

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Fractal conceptual illustration of supersymmetry or superstrings. Supersymmetry (SUSY) is a particle physics theory that proposes a type of spacetime symmetry relating two basic classes of elementary particles: bosons, which have an integer-valued 'spin', and fermions, which have a half-integer spin. If supersymmetry is a true symmetry of nature, it would explain many mysterious features of particle physics and would help solve paradoxes such as the cosmological constant problem. There is only indirect evidence for the existence of supersymmetry, primarily in the form of evidence for gauge coupling unification. Direct confirmation would entail production of superpartners at collider experiments, such as at the Large Hadron Collider.

Space

A crisis in cosmology may mean hidden dimensions really exist

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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

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

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Physics

The forgotten women of quantum physics

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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?

Quantum effects like superposition and entanglement have long been seen in single particles, but physicists are on a quest to find out just how big an object can be before it loses its quantumness

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Physics

Could the ancient Greeks have invented quantum theory?

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Physics

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

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Physics

How a quantum innovation may quash the idea of the multiverse

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Physics

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

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