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Experimental entanglement concentration and universal Bell-state synthesizer

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Kim, Y., Kulik, S., Chekhova, M., Grice, W., & Shih, Y. (2003). Experimental entanglement concentration and universal Bell-state synthesizer. PHYSICAL REVIEW A, 67(1): 010301. doi:10.1103/PhysRevA.67.010301.


Cite as: http://hdl.handle.net/21.11116/0000-0001-DF88-B
Abstract
We report a Bell-state synthesizer in which an interferometric entanglement concentration scheme is used. An initially mixed polarization state from type-II spontaneous parametric down-conversion becomes entangled after the interferometric entanglement concentration. This Bell-state synthesizer is universal in the sense that the output polarization state is not affected by spectral filtering, crystal thickness, and, most importantly, the choice of pump source. It is also robust against environmental disturbance and a more general state, partially mixed-partially entangled state, can be readily generated as well.