Time-bin polarization format exchange technique for entangled optical source
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United States of America Patent
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Aug 13, 2013
Grant Date -
Jul 14, 2011
app pub date -
Dec 28, 2010
filing date -
Jan 14, 2010
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Abstract
It is an object of the present invention to provide a network system for quantum key distribution (QKD) for free space and fiber networks. The system of the present invention generates a couple of photons which have different wavelength and inputs each of the photons into the asymmetric Mach-Zehnder interferometer to obtain time-bin entangled state. It provides polarization information with one part of the photons. Then it can obtain hybrid quantum entanglement. The system of the present invention may be used hybrid quantum key distribution system applied for both free space and fibers.
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