Detection and engineering of spatial mode entanglement with ultracold bosons
Goold, J. Heaney, L. Busch, T. Vedral, V.
Goold, J.
Busch, T.
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Abstract
We outline an interferometric scheme for the detection of bimode and multimode spatial entanglement of finite-temperature interacting Bose gases. Whether entanglement is present in the gas depends on the existence of the single-particle reduced density matrix between different regions of space. We apply the scheme to the problem of a harmonically trapped repulsive boson pair and show that while entanglement is rapidly decreasing with temperature, a significant amount remains for all interaction strengths at zero temperature. Thus, by tuning the interaction parameter, the distribution of entanglement between many spatial modes can be modified. © 2009 The American Physical Society.
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Physical Review A - Atomic, Molecular, and Optical Physics
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Date
2009-08-28
DOI
10.1103/PhysRevA.80.022338
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Article