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Non-equilibrium dynamics of a double-well Bose–Einstein condensate-dual reservoir system


Rajagopal, Kalai K. and Gafurjan, Ibragimov (2021) Non-equilibrium dynamics of a double-well Bose–Einstein condensate-dual reservoir system. Brazilian Journal of Physics, 51 (4). 944 - 953. ISSN 0103-9733; ESSN: 1678-4448


We have studied the dynamics of a two-site Bose–Einstein condensate subject to tunnelling coupling (which makes the system a bosonic Josephson junction), having on-site inter-particle interaction (making the system a small Bose–Hubbard model) and in contact with two separate heat baths, which makes the system lossy and potentially drives it into a non-equilibrium state with some heat current. The dynamical calculation of the system is done within the standard quantum generalized Langevin setting, and the heat baths are assumed to have non-zero memory time (Ornstein–Uhlenbeck process). We numerically calculated the time evolution of the population imbalance, coherence and entanglement of the system. We have shown inter-particle interaction, noise and dissipation induced by BEC atoms-reservoir interaction that are crucial in affecting the dynamics of the mentioned physical parameters. The study also indicates that quantumness (non-classicality) of the system is characterized by the interplay between dissipation and inter-particle interaction.

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Additional Metadata

Item Type: Article
Divisions: Institute for Mathematical Research
DOI Number: https://doi.org/10.1007/s13538-021-00904-9
Publisher: Springer
Keywords: Double-well BEC; Dissipation; OU noise; Non-Markovian
Depositing User: Ms. Nur Faseha Mohd Kadim
Date Deposited: 04 Apr 2023 02:30
Last Modified: 04 Apr 2023 02:30
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1007/s13538-021-00904-9
URI: http://psasir.upm.edu.my/id/eprint/94370
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