Quantum Physics News

SLAC Scientists View Ultrafast Snapshots of Light-Driven Superconductivity

April 18, 2014

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Scientists at SLAC National Accelerator Laboratory’s Linac Coherent Light Source used carefully timed pairs of laser pulses to capture ultrafast snapshots of light-driven superconductivity. A new study pins down a major factor behind the appearance of superconductivity – the ability to conduct electricity with 100 percent efficiency – in a promising copper-oxide material. Scientists used […]

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New Technique Allows Particles to Switch the Quantum State of Each Other

April 10, 2014

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Researchers from MIT and Harvard University have developed a new technique that couples a lone atom with single light particle, allowing both the atom and photon to switch the quantum state of the other particle. Using a laser to place individual rubidium atoms near the surface of a lattice of light, scientists at MIT and […]

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Researchers Observe What Happens During a Quantum Phase Transition

April 7, 2014

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In a newly published study, researchers observe what happens during a quantum phase transition, and compare the “quantum melting” of the magnetic structure with the classical “thermal melting” phase transition. When ice is warmed, the water molecules forming its structure vibrate more and more vigorously until finally the forces between them are no longer strong […]

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Researchers Entangle Two Independent Photons with Different Frequencies

April 2, 2014

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Using time-resolved measurement and active feed forward, researchers from the University of Science and Technology of China have entangled two independent photons of different colors for the first time. Entanglement has been capturing the imagination of scientists as well as the public ever since it first emerged from the newly minted quantum mechanics formalism eight […]

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Quantum Mechanics May Lead to an Ultra-Secure Internet

March 25, 2014

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Researchers give theoretical proof that quantum mechanics may lead to an ultra-secure internet. Einstein’s skepticism about quantum mechanics may lead to an ultra-secure internet suggests a new paper by researchers from Swinburne University of Technology and Peking University. Associate Professor Margaret Reid from Swinburne’s Center for Quantum and Optical Science said Einstein’s reservations about quantum […]

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Researchers Discover the First Direct Evidence of Cosmic Inflation

March 18, 2014

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Researchers have discovered the first direct evidence of cosmic inflation, confirming a deep connection between quantum mechanics and general relativity. Cambridge, Massachusetts – Almost 14 billion years ago, the universe we inhabit burst into existence in an extraordinary event that initiated the Big Bang. In the first fleeting fraction of a second, the universe expanded […]

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Researchers Discover an Efficient Way of Slowing the Rotation of Molecular Ions

March 14, 2014

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An international team of researchers has discovered an efficient and versatile way of slowing the rotation of molecular ions, opening up new possibilities for laboratory-based astrochemistry. Chemical reactions taking place in outer space can now be more easily studied on Earth. An international team of researchers from the University of Aarhus in Denmark and the […]

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Researchers Combine Excited States of Two Materials into a New Quantum Mechanical State

March 3, 2014

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A team of researchers has taken the excited states of two principally different materials and combined them into a new quantum mechanical state that shares their best properties. Ann Arbor — Like a spring connecting two swings, light can act as photon glue that binds together the quantum mechanical properties of two vastly different materials. […]

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High-Precision Measurement of the Electron is More Precise by a Factor of 13

February 28, 2014

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Physicists from the Max Planck Institute have achieved a high-precision measurement of the atomic mass of the electron, 13 times more precise than previously known. Electrons are the quantum glue of our world. Without electrons there would be no chemistry, and light would be unable to interact with matter. If electrons were only a little […]

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Researchers Perform Logic Operation and Error Correction in a Quantum Register

February 21, 2014

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An international team of physicists has discovered a way to control the quantum system of a diamond with a small number of nitrogen impurities. Computers do not necessarily have to perform error-free calculations in order to provide perfect results – they only need to correct their errors in a reliable way. And this will become […]

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Researchers Propose Using Distant Quasars to Test Bell’s Theorem

February 20, 2014

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A team of researchers has proposed a practical scheme to use photons from causally disconnected cosmic sources to set the detectors in an experimental test of Bell’s inequality. In a new paper, MIT researchers propose an experiment that may close the last major loophole of Bell’s inequality — a 50-year-old theorem that, if violated by […]

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Physicists Observe Hysteresis in an Ultracold Atomic Gas

February 13, 2014

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Using a superfluid atomtronic circuit, physicists have observed hysteresis in an ultracold atomic gas for the first time. Atomtronics is an emerging technology whereby physicists use ensembles of atoms to build analogs to electronic circuit elements. Modern electronics relies on utilizing the charge properties of the electron. Using lasers and magnetic fields, atomic systems can […]

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