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Phys Rev Lett. 2009 Jan 16;102(2):020501. Epub 2009 Jan 12.

Establishing Einstein-Poldosky-Rosen channels between nanomechanics and atomic ensembles.

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  • 1Institut für Theoretische Physik, Universität Innsbruck, A-6020 Innsbruck, Austria.


We suggest interfacing nanomechanical systems via an optical quantum bus to atomic ensembles, for which means of high precision state preparation, manipulation, and measurement are available. This allows, in particular, for a quantum nondemolition Bell measurement, projecting the coupled system, atomic-ensemble-nanomechanical resonator, into an entangled EPR state. The entanglement is observable even for nanoresonators initially well above their ground states and can be utilized for teleportation of states from an atomic ensemble to the mechanical system.

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