Blocked populations in ring-shaped optical lattices
We study a special dynamical regime of a Bose-Einstein condensate in a ring-shaped lattice where the populations in each site remain constant during the time evolution. The states in this regime are characterized by equal occupation numbers in alternate wells and nontrivial phases, while the phase d...
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2018
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_24699926_v98_n6_p_Nigro http://hdl.handle.net/20.500.12110/paper_24699926_v98_n6_p_Nigro |
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paper:paper_24699926_v98_n6_p_Nigro2023-06-08T16:36:10Z Blocked populations in ring-shaped optical lattices Bose-Einstein condensation Crystal lattices Optical materials Statistical mechanics Bose-Einstein condensates Dynamical regime Full three-dimensional Multimode models Occupation numbers Persistent currents Ring-shaped optical lattices Site interaction Optical lattices We study a special dynamical regime of a Bose-Einstein condensate in a ring-shaped lattice where the populations in each site remain constant during the time evolution. The states in this regime are characterized by equal occupation numbers in alternate wells and nontrivial phases, while the phase differences between neighboring sites evolve in time yielding persistent currents that oscillate around the lattice. We show that the velocity circulation around the ring lattice alternates between two values determined by the number of wells and with a specific time period that is only driven by the on-site interaction energy parameter. In contrast to the self-trapping regime present in optical lattices, the occupation number at each site does not show any oscillation and the particle imbalance does not possess a lower bound for the phenomenon to occur. These findings are predicted with a multimode model and confirmed by full three-dimensional Gross-Pitaevskii simulations using an effective on-site interaction energy parameter. © 2018 American Physical Society. 2018 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_24699926_v98_n6_p_Nigro http://hdl.handle.net/20.500.12110/paper_24699926_v98_n6_p_Nigro |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Bose-Einstein condensation Crystal lattices Optical materials Statistical mechanics Bose-Einstein condensates Dynamical regime Full three-dimensional Multimode models Occupation numbers Persistent currents Ring-shaped optical lattices Site interaction Optical lattices |
| spellingShingle |
Bose-Einstein condensation Crystal lattices Optical materials Statistical mechanics Bose-Einstein condensates Dynamical regime Full three-dimensional Multimode models Occupation numbers Persistent currents Ring-shaped optical lattices Site interaction Optical lattices Blocked populations in ring-shaped optical lattices |
| topic_facet |
Bose-Einstein condensation Crystal lattices Optical materials Statistical mechanics Bose-Einstein condensates Dynamical regime Full three-dimensional Multimode models Occupation numbers Persistent currents Ring-shaped optical lattices Site interaction Optical lattices |
| description |
We study a special dynamical regime of a Bose-Einstein condensate in a ring-shaped lattice where the populations in each site remain constant during the time evolution. The states in this regime are characterized by equal occupation numbers in alternate wells and nontrivial phases, while the phase differences between neighboring sites evolve in time yielding persistent currents that oscillate around the lattice. We show that the velocity circulation around the ring lattice alternates between two values determined by the number of wells and with a specific time period that is only driven by the on-site interaction energy parameter. In contrast to the self-trapping regime present in optical lattices, the occupation number at each site does not show any oscillation and the particle imbalance does not possess a lower bound for the phenomenon to occur. These findings are predicted with a multimode model and confirmed by full three-dimensional Gross-Pitaevskii simulations using an effective on-site interaction energy parameter. © 2018 American Physical Society. |
| title |
Blocked populations in ring-shaped optical lattices |
| title_short |
Blocked populations in ring-shaped optical lattices |
| title_full |
Blocked populations in ring-shaped optical lattices |
| title_fullStr |
Blocked populations in ring-shaped optical lattices |
| title_full_unstemmed |
Blocked populations in ring-shaped optical lattices |
| title_sort |
blocked populations in ring-shaped optical lattices |
| publishDate |
2018 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_24699926_v98_n6_p_Nigro http://hdl.handle.net/20.500.12110/paper_24699926_v98_n6_p_Nigro |
| _version_ |
1768544843677564928 |