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Proceedings Paper

Nonlocality in the presence of superselection rules
Author(s): Frank Verstraete; N. Schuch; J. I. Cirac
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Paper Abstract

Effective superselection rules severely alter the possible operations that can be implemented on a distributed quantum system. Superselection rules appear in e.g. the context of experiments with entangled cold gases: in this case all local operations have to conserve the local particle number. These superselection rules enforces us to reconsider the notion of nonlocality, as the new constraint implies limitations on the local operations that can be implemented. This gives rise to a novel form of nonlocality, and it is possible to associate a new nonlocal resource to it. In this paper we characterize this new resource, quantify it and discuss some applications.

Paper Details

Date Published: 25 May 2004
PDF: 7 pages
Proc. SPIE 5468, Fluctuations and Noise in Photonics and Quantum Optics II, (25 May 2004); doi: 10.1117/12.548387
Show Author Affiliations
Frank Verstraete, Max-Planck-Institut fur Quantenoptik (Germany)
N. Schuch, Max-Planck-Institut fur Quantenoptik (Germany)
J. I. Cirac, Max-Planck-Institut fur Quantenoptik (Germany)

Published in SPIE Proceedings Vol. 5468:
Fluctuations and Noise in Photonics and Quantum Optics II
Peter Heszler, Editor(s)

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