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Charles Wilson
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"Third Loophole" Against Entanglement Eliminated
http://physicsworld.com/cws/article/news/2013/apr/23/third-bell-loophole-closed-for-photons
CW
The third and final loophole in an important test of the quantum nature of the photon has been closed by an international team of physicists. The researchers have shut what is called the "fair sampling" loophole, which says that classical – rather than quantum – effects could be responsible for measured correlations between entangled pairs of photons. The photon is now the first system in which the violation of "Bell's inequality" has been unambiguously established. While few physicists will be surprised that all three loopholes have now been closed, doing so could be an important step towards developing failsafe quantum cryptography.
http://physicsworld.com/cws/article/news/2013/apr/23/third-bell-loophole-closed-for-photons
CW
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