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Continuous variable entanglement sharing in noninertial frames
Dipartimento di Fisica “E. R. Caianiello”, Universit`a degli Studi di Salerno, Baronissi, Italy.
Instituto de Ciencias Nucleares, Universidad Nacional Aut´onoma de M´exico, Mexico.
Centre for Quantum Computation, DAMTP, University of Cambridge, UK.
2007 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 76, no 6, 062112- p.Article in journal (Refereed) Published
Abstract [en]

We study the distribution of entanglement between modes of a free scalar field from the perspective of observers in uniform acceleration. We consider a two-mode squeezed state of the field from an inertial perspective, and analytically study the degradation of entanglement due to the Unruh effect, in the cases of either one or both observers undergoing uniform acceleration. We find that for two observers undergoing finite acceleration, the entanglement vanishes between the lowest frequency modes. The loss of entanglement is precisely explained as a redistribution of the inertial entanglement into multipartite quantum correlations among accessible and unaccessible modes from a non-inertial perspective. We show that classical correlations are also lost from the perspective of two accelerated observers but conserved if one of the observers remains inertial.

Place, publisher, year, edition, pages
2007. Vol. 76, no 6, 062112- p.
National Category
Physical Sciences
Research subject
URN: urn:nbn:se:uu:diva-150350DOI: 10.1103/PhysRevA.76.062112OAI: oai:DiVA.org:uu-150350DiVA: diva2:407057
Available from: 2011-03-29 Created: 2011-03-29 Last updated: 2011-04-07Bibliographically approved

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