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On the robustness of entanglement in analogue gravity systems

Bruschi, David Edward; Friis, Nicolai; Fuentes, Ivette; Weinfurtner, Silke

Authors

David Edward Bruschi

Nicolai Friis

Ivette Fuentes

Silke Weinfurtner



Abstract

We investigate the possibility of generating quantum-correlated quasi-particles utilizing analogue gravity systems. The quantumness of these correlations is a key aspect of analogue gravity effects and their presence allows for a clear separation between classical and quantum analogue gravity effects. However, experiments in analogue systems, such as Bose–Einstein condensates (BECs) and shallow water waves, are always conducted at non-ideal conditions, in particular, one is dealing with dispersive media at non-zero temperatures. We analyse the influence of the initial temperature on the entanglement generation in analogue gravity phenomena. We lay out all the necessary steps to calculate the entanglement generated between quasi-particle modes and we analytically derive an upper bound on the maximal temperature at which given modes can still be entangled. We further investigate a mechanism to enhance the quantum correlations. As a particular example, we analyse the robustness of the entanglement creation against thermal noise in a sudden quench of an ideally homogeneous BEC, taking into account the super-sonic dispersion relations.

Journal Article Type Article
Publication Date Nov 30, 2013
Journal New Journal of Physics
Electronic ISSN 1367-2630
Publisher IOP Publishing
Peer Reviewed Peer Reviewed
Volume 15
Issue 113016
APA6 Citation Bruschi, D. E., Friis, N., Fuentes, I., & Weinfurtner, S. (2013). On the robustness of entanglement in analogue gravity systems. New Journal of Physics, 15(113016), https://doi.org/10.1088/1367-2630/15/11/113016
DOI https://doi.org/10.1088/1367-2630/15/11/113016
Publisher URL http://iopscience.iop.org/article/10.1088/1367-2630/15/11/113016/meta
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0





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