Manipulating mesoscopic multipartite entanglement with atom-light interfaces

TitleManipulating mesoscopic multipartite entanglement with atom-light interfaces
Publication TypeJournal Article
Year of Publication2009
AuthorsStasińska, J, Rodó, C, Paganelli, S, Sanpera, A, Birkl, G
JournalPhysical Review A (Atomic, Molecular, and Optical Physics)
Volume80
Issue6
Pagination062304–8
Date Published12/2009
Keywordsatom-photon collisions, EPR paradox, measurement theory, mesoscopic entanglement, multipartite entanglement, quantum entanglement, quantum optics
Abstract

Entanglementbetween two macroscopic atomic ensembles induced by measurement on anancillary light system has proven to be a powerful methodfor engineering quantum memories and quantum state transfer. Here weinvestigate the feasibility of such methods for generation, manipulation, anddetection of genuine multipartite entanglement (Greenberger-Horne-Zeilinger and clusterlike states) betweenmesoscopic atomic ensembles without the need of individual addressing ofthe samples. Our results extend in a nontrivial way theEinstein-Podolsky-Rosen entanglement between two macroscopic gas samples reported experimentally in[B. Julsgaard, A. Kozhekin, and E. Polzik, Nature (London) 413,400 (2001)]. We find that under realistic conditions, a secondorthogonal light pulse interacting with the atomic samples, can modifyand even reverse the entangling action of the first oneleaving the samples in a separable state. ©2009 The American Physical Society

URLhttp://link.aps.org/abstract/PRA/v80/e062304
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