Remove definition quantum-physics
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Complex numbers are essential in quantum theory, experiments reveal

Physics World

Complex numbers are essential to achieve the most accurate quantum-mechanical description of nature, according to experiments done by two independent teams of physicists. While the mathematics of complex numbers underlies modern quantum theory, it is also possible to describe the quantum world purely in terms of real numbers.

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Xanadu puts quantum advantage in the cloud

Physics World

Researchers at Xanadu , a Canadian company specializing in photonic quantum computing, claim to have achieved quantum computational advantage with an experiment run on their cloud-accessible Borealis machine. Building on previous quantum advantage results. So this is definitely a hard challenge.”.

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Quantum Cheshire cats could have a travelling grin

Physics World

Since its inception, quantum theory has presented us with many strange and seemingly paradoxical phenomena. One of the oddest examples is the quantum Cheshire cat effect, in which properties of quantum objects become disembodied from the objects themselves. A new spin on the quantum Cheshire cat.

2013 133
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The unsung theory: why thermodynamics is as important as quantum mechanics and general relativity

Physics World

Like many science writers, I have often adopted the conceit that quantum mechanics and general relativity are our two principal (if incompatible) theories of the physical world. It undergirds the theories of information and computation, for example via mathematician Claude Shannon ’s definition of information entropy.

Law 145
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Supersolidity enters a second dimension

Physics World

Subsequent studies have produced nothing definitive. BECs (ultracold gases of trapped atoms all cooled to the quantum ground state of the trap) of highly magnetic atoms can spontaneously form regular, ordered clusters in an applied magnetic field, showing the emergence of supersolidity from a completely isotropic superfluid state. “The

2019 131
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Why we need to stop gaslighting minority physics students

Physics World

If the students have developed a sense that they don’t belong, it might be because they have excellent observational skills: they have noticed that the world of physics was not built for them. Typically, this breakdown was along the lines of classical mechanics versus quantum mechanics. Culturally bound.

Waste 133
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Conquering the challenge of quantum optimization

Physics World

Quantum computers are often touted as the solution to all our problems. Fuelled by this enthusiasm, a number of quantum computing firms have started joining established markets. However, despite this interest, there is still a lot of uncertainty around the near-term uses of quantum computers. Optimization is hard.

2014 132