Non-equilibrium dynamics of a double-well Bose–Einstein condensate-dual reservoir system
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...
| Main Authors: | , |
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| Format: | Article |
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Springer
2021
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| Online Access: | http://psasir.upm.edu.my/id/eprint/94370/ |
| _version_ | 1848861978799374336 |
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| author | Rajagopal, Kalai K. Gafurjan, Ibragimov |
| author_facet | Rajagopal, Kalai K. Gafurjan, Ibragimov |
| author_sort | Rajagopal, Kalai K. |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | 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. |
| first_indexed | 2025-11-15T13:09:43Z |
| format | Article |
| id | upm-94370 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-15T13:09:43Z |
| publishDate | 2021 |
| publisher | Springer |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-943702023-04-04T02:30:35Z http://psasir.upm.edu.my/id/eprint/94370/ Non-equilibrium dynamics of a double-well Bose–Einstein condensate-dual reservoir system Rajagopal, Kalai K. Gafurjan, Ibragimov 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. Springer 2021-04-23 Article PeerReviewed 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 https://link.springer.com/article/10.1007/s13538-021-00904-9 10.1007/s13538-021-00904-9 |
| spellingShingle | Rajagopal, Kalai K. Gafurjan, Ibragimov Non-equilibrium dynamics of a double-well Bose–Einstein condensate-dual reservoir system |
| title | Non-equilibrium dynamics of a double-well Bose–Einstein condensate-dual reservoir system |
| title_full | Non-equilibrium dynamics of a double-well Bose–Einstein condensate-dual reservoir system |
| title_fullStr | Non-equilibrium dynamics of a double-well Bose–Einstein condensate-dual reservoir system |
| title_full_unstemmed | Non-equilibrium dynamics of a double-well Bose–Einstein condensate-dual reservoir system |
| title_short | Non-equilibrium dynamics of a double-well Bose–Einstein condensate-dual reservoir system |
| title_sort | non-equilibrium dynamics of a double-well bose–einstein condensate-dual reservoir system |
| url | http://psasir.upm.edu.my/id/eprint/94370/ http://psasir.upm.edu.my/id/eprint/94370/ http://psasir.upm.edu.my/id/eprint/94370/ |