Tag Archives: physics

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Caught on camera: Quantum mechanics in action

August 8, 2012 – 11:00 pm

Caught on camera: Quantum mechanics in action - Scientists at the University of Glasgow have captured images of quantum entanglement on camera for the first time. The team have measured strong spatial entanglement of photons using a highly sensitive camera. Making use of a 201 by 201 pixel array, the camera could observe the full field of the quantum light at the same time, allowing them to see up to 2,500 different entangled dimensions or states. By taking pictures of pairs of photons, the researchers measured correlations in the photons’ positions to a degree that is not allowed according to classical physics.
(10.1038/ncomms1988)

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New method knocks out stubborn electron problem

July 5, 2012 – 7:01 am

New method knocks out stubborn electron problem - A newly published article in Physical Review Letters eliminates one of the top unsolved theoretical problems in chemical physics as ranked by the National Research Council in 1995. Scientists now can more accurately predict the dynamic behavior of electrons in atoms and molecules in chemical reactions that govern a wide range of phenomena, including the fuel efficiency of combustion engines and the depletion of the atmospheric ozone. Reference: "Structure of Fermionic Density Matrices: Complete N-representability Conditions," Physical Review Letters, 2012; 108 (26) DOI: (10.1103/PhysRevLett.108.263002)

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BaBar Data Hint at Cracks in the Standard Model

June 20, 2012 – 3:00 pm

BaBar Data Hint at Cracks in the Standard Model - Recently analyzed data from the BaBar experiment may suggest possible flaws in the Standard Model of particle physics, the reigning description of how the universe works on subatomic scales. The data from BaBar, a high-energy physics experiment based at the US Department of Energy's SLAC National Accelerator Laboratory, show that a particular type of particle decay called "B to D-star-tau-nu" happens more often than the Standard Model says it should. Reference: Evidence for an excess of B -> D(*) Tau Nu decays, arXiv:1205.5442v1 [hep-ex]

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