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Increasing entanglement between Gaussian states by coherent photon subtraction

Abstract : We experimentally demonstrate that the entanglement between Gaussian entangled states can be increased by non-Gaussian operations. Coherent subtraction of single photons from Gaussian quadrature-entangled light pulses, created by a non-degenerate parametric amplifier, produces delocalized states with negative Wigner functions and complex structures, more entangled than the initial states in terms of negativity. The experimental results are in very good agreement with the theoretical predictions.
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https://hal.archives-ouvertes.fr/hal-00090186
Contributor : Alexei Ourjoumtsev Connect in order to contact the contributor
Submitted on : Monday, January 29, 2007 - 6:33:50 PM
Last modification on : Sunday, June 26, 2022 - 11:46:46 AM
Long-term archiving on: : Friday, September 24, 2010 - 10:51:16 AM

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Alexei Ourjoumtsev, Aurelien Dantan, Rosa Tualle-Brouri, Philippe Grangier. Increasing entanglement between Gaussian states by coherent photon subtraction. Physical Review Letters, American Physical Society, 2007, 98, pp.030502. ⟨10.1103/PhysRevLett.98.030502⟩. ⟨hal-00090186v4⟩

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