Three-observer Bell inequality violation on a two-qubit entangled state

Bipartite Bell inequalities can simultaneously be violated by two different pairs of observers when weak measurements and signalling is employed. Here, we experimentally demonstrate the violation of two simultaneous CHSH inequalities by exploiting a two-photon polarisation maximally entangled state. Our results demonstrate that large double violation is experimentally achievable. Our demonstration may have impact for Quantum Key Distribution or certification of Quantum Random Number generators based on weak measurements. …

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Can quantum theory explain why jokes are funny?

Researchers are taking the first steps towards of a quantum theory model of humor, to explain what really happens on the cognitive level in the moment when we ‘get the joke.’

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Watching the orbital angular momentum of plasmons on a nanoscale with subfemtosecond time resolution

A team of scientists has been able to reveal, for the first time, the dynamics of the orbital angular momentum of plasmons. The researchers used a combination of extremely high-quality single crystals of gold, ultrafast laser pulses and an electron microscope.

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A Ticking Evolutionary Clock

How quickly will a gene’s rate of evolution slow to a crawl? …

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Quantum physics offers insight into music expressivity

Scientists are bringing us closer to understanding the musical experience through a novel approach to analyzing a common musical effect known as vibrato.

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Mapping the effects of crystal defects

Research offers insights into how crystal dislocations — a common type of defect in materials — can affect electrical and heat transport through crystals, at a microscopic, quantum mechanical level. A new mathematical approach to analyzing these dislocations uses a new quasiparticle called a dislon.

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Quantum key system could make mobile transactions far more secure

For the first time, researchers have demonstrated a prototype device that can send unbreakable secret keys from a handheld device to a terminal.

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New approach to the quantum measurement problem

Quantum mechanics is a probabilistic theory that does not describe individual events. Yet when we perform a single measurement, we find a well-defined outcome. This apparent contradiction, known as the measurement problem, has a long history going back to the early days of quantum mechanics. A research collaboration proposes a new approach to this problem.

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