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arXiv · 1805.00709

Two distinguishable impurities in BEC: squeezing and entanglement of two Bose polarons

C. Charalambous·M. A. Garcia-March·A. Lampo·M. Mehboudi·M. Lewenstein
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Abstract

We study entanglement and squeezing of two uncoupled impurities immersed in a Bose-Einstein condensate. We treat them as two quantum Brownian particles interacting with a bath composed of the Bogoliubov modes of the condensate. The Langevin-like quantum stochastic equations derived exhibit memory effects. We study two scenarios: (i) In the absence of an external potential, we observe sudden death of entanglement; (ii) In the presence of an external harmonic potential, entanglement survives even at the asymptotic time limit. Our study considers experimentally tunable parameters.

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C. Charalambous, M. A. Garcia-March, A. Lampo, M. Mehboudi, M. Lewenstein. 2018-05-02. Two distinguishable impurities in BEC: squeezing and entanglement of two Bose polarons. https://doi.org/10.21468/scipostphys.6.1.010

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