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Entanglement swapping between spacelike-separated atoms

AuthorsLeón, Juan ; Sabín, Carlos
KeywordsBell theorem
Quantum entanglement
Vacuum (elementary particles)
[PACS] Entanglement production and manipulation (quantum information)
[PACS] Entanglement and quantum nonlocality
[PACS] Quantum description of interaction of light and matter; related experiments
Issue Date10-Nov-2008
PublisherAmerican Physical Society
CitationPhysical Review A 78(5): 052314 (2008)
AbstractWe show a mechanism that projects a pair of neutral two-level atoms from an initially uncorrelated state to a maximally entangled state while they remain spacelike separated. The atoms begin both excited in a common electromagnetic vacuum, and the radiation is collected with a partial Bell-state analyzer. If the interaction time is short enough and a certain two-photon Bell state is detected after the interaction, a high degree of entanglement, even maximal, can be generated while one atom is outside the light cone of the other, for arbitrary large interatomic distances.
Description4 pages, 4 figures.-- PACS nrs.: 03.67.Bg; 03.65.Ud; 42.50.Ct.-- ArXiv pre-print available at: http://arxiv.org/abs/0807.2711
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevA.78.052314
Appears in Collections:(CFMAC-IFF) Artículos
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