Manipulating mesoscopic multipartite entanglement with atom-light interfaces
Stasinska, Julia (Universitat Autònoma de Barcelona. Departament de Física)
Rodó Sarró, Carles (Universitat Autònoma de Barcelona. Departament de Física)
Paganelli, Simone (Universitat Autònoma de Barcelona. Departament de Física)
Birkl, Gerhard (Universität Darmstadt. Institut für Angewandte Physik, Technische)
Sanpera Trigueros, Anna (Universitat Autònoma de Barcelona. Departament de Física)
American Physical Society

Data:	2009
Resum:	Entanglement between two macroscopic atomic ensembles induced by measurement on an ancillary light system has proven to be a powerful method for engineering quantum memories and quantum state transfer. Here we investigate the feasibility of such methods for generation, manipulation, and detection of genuine multipartite entanglement (Greenberger-Horne-Zeilinger and clusterlike states) between mesoscopic atomic ensembles without the need of individual addressing of the samples. Our results extend in a nontrivial way the Einstein-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 second orthogonal light pulse interacting with the atomic samples, can modify and even reverse the entangling action of the first one leaving the samples in a separable state.
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Publicat a:	Physical review. A, Vol. 80, Issue 6 (December 2009) , p. 062304-1-062304-8, ISSN 1050-2947

DOI: 10.1103/PhysRevA.80.062304

8 p, 252.8 KB

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