5 September 2008 Macroscopic quantum entanglement
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In the present work we propose to realize a macroscopic light-matter entangled state, obtained by the interaction of a multiphoton quantum superposition with a BEC system. The multiphoton quantum state is generated by a quantum-injected optical parametric amplifier (QI-OPA) seeded by a single-photon belonging to an EPR entangled pair and interacts with a Mirror-BEC shaped as a Bragg interference structure. The overall process will realize an entangled macroscopic quantum superposition involving a "microscopic" single-photon state of polarization and the coherent "macroscopic" displacement of the BEC structure acting in space-like separated distant places. This hybrid photonic-atomic system could open new perspectives on the possibility of coupling the amplified radiation with an atomic ensemble, a Bose-Einstein condensate, in order to implement innovative quantum interface between light and matter.
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Francesco S. Cataliotti, Francesco De Martini, Fabio Sciarrino, Nicolò Spagnolo, Chiara Vitelli, "Macroscopic quantum entanglement", Proc. SPIE 7092, Quantum Communications and Quantum Imaging VI, 70920T (5 September 2008); doi: 10.1117/12.797927; https://doi.org/10.1117/12.797927


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