Tag Archives | Quantum mechanics

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Study identifies recipe for Goldilocks quantum phase transitions

University of Miami researchers have found that crossing a quantum phase transition at just-the-right speed generates the richest, most complex light-matter entanglement – a characteristic evident in our Universe. Such structure resembles “defects” in an otherwise smooth and empty space. The findings are published in Physical Review A, the American Physical Society’s main journal. “Our […]

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Image captures light as both a particle and a wave




Quantum mechanics tells us that light can behave simultaneously as a particle or a wave, but it’s only possible to see one of these attributes at any given moment. Even though a variety of experiments have successfully observed both behaviors of light, they have never been able to observe both at the same time. Now, […]




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Mysterious “action at a distance” between liquids may be commonplace




Back in 2010, researchers found that superfluid helium reservoirs stored in separate containers could behave collectively. Now, a new theoretical model reveals that the phenomenon of mysterious “action at a distance” between fluid reservoirs is much more common than previously thought. The original discovery, made by a team from the University at Buffalo and the […]




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Quantum camera takes pic using only entangled photons




Using a new quantum imaging technique, a picture has been captured without the camera detecting the light that was used to illuminate the subject. Instead, the detector relies on entangled photons that have never touched the subject (in this case, a silhouette of a cat). Normally, an image of an object is obtained by sensing […]




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Physicists map quantum to classical collapse




Extracting information from a system as it collapses from a quantum state to a classical state was never considered possible by the original founders of quantum theory, but Berkeley physicists have managed to extract information from a system continuously throughout its change of state, an achievement they say is like monitoring Schrodinger’s cat through the […]




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Algae turn quantum coherence on and off




A team of researchers has discovered how algae that survive in very low levels of light are able to switch on-and-off a quantum phenomenon known as coherence. The function of coherence in the algae remains a mystery, but the researchers think it could help the organisms harvest energy from the Sun much more efficiently. The […]




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Researchers go beyond quantum limit




Scientists are capable of measuring the position of an object with unprecedented accuracy, but the Heisenberg uncertainty principle ultimately places a fundamental limit on such measurements (known as the standard quantum limit). Now, however, Caltech researchers have found a way to filter this quantum background “noise” and make measurements that go beyond the limits imposed […]




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Quasars at opposite ends of the Universe could close a loophole in quantum mechanics




Physicists have proposed an experiment that may close the last major loophole of Bell’s inequality – a 50-year-old theorem that, if violated by experiments, would mean that our Universe is based not on the laws of classical physics, but on the probabilities of quantum mechanics. In 1964, physicist John Bell took on this seeming disparity […]




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