Dynamics of first-order quantum phase transitions in extended Bose–Hubbard model: from density wave to superfluid and vice versa
In this paper, we study the nonequilibrium dynamics of the Bose–Hubbard model with the nearest-neighbor repulsion by using time-dependent Gutzwiller (GW) methods. In particular, we vary the hopping parameters in the Hamiltonian as a function of time, and investigate the dynamics of the system from t...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2018-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/aad5f9 |
| _version_ | 1827873366945562624 |
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| author | Keita Shimizu Takahiro Hirano Jonghoon Park Yoshihito Kuno Ikuo Ichinose |
| author_facet | Keita Shimizu Takahiro Hirano Jonghoon Park Yoshihito Kuno Ikuo Ichinose |
| author_sort | Keita Shimizu |
| collection | DOAJ |
| description | In this paper, we study the nonequilibrium dynamics of the Bose–Hubbard model with the nearest-neighbor repulsion by using time-dependent Gutzwiller (GW) methods. In particular, we vary the hopping parameters in the Hamiltonian as a function of time, and investigate the dynamics of the system from the density wave (DW) to the superfluid (SF) crossing a first-order phase transition and vice versa. From the DW to SF, we find scaling laws for the correlation length and vortex density with respect to the quench time. This is a reminiscence of the Kibble–Zurek scaling for continuous phase transitions and contradicts the common expectation. We give a possible explanation for this observation. On the other hand from SF to DW, the system evolution depends on the initial SF state. When the initial state is the ground state obtained by the static GW methods, a coexisting state of the SF and DW domains forms after passing through the critical point. Coherence of the SF order parameter is lost as the system evolves. This is a phenomenon similar to the glass transition in classical systems. When the state starts from the SF with small local phase fluctuations, the system obtains a large size DW domain structure with thin domain walls. |
| first_indexed | 2024-03-12T16:36:00Z |
| format | Article |
| id | doaj.art-ecbe9144e4ed408d9da24856c881ec94 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:36:00Z |
| publishDate | 2018-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-ecbe9144e4ed408d9da24856c881ec942023-08-08T14:53:29ZengIOP PublishingNew Journal of Physics1367-26302018-01-0120808300610.1088/1367-2630/aad5f9Dynamics of first-order quantum phase transitions in extended Bose–Hubbard model: from density wave to superfluid and vice versaKeita Shimizu0Takahiro Hirano1Jonghoon Park2Yoshihito Kuno3Ikuo Ichinose4Department of Applied Physics, Nagoya Institute of Technology , Nagoya 466-8555, JapanDepartment of Applied Physics, Nagoya Institute of Technology , Nagoya 466-8555, JapanDepartment of Applied Physics, Nagoya Institute of Technology , Nagoya 466-8555, JapanDepartment of Physics, Graduate School of Science, Kyoto University , Kyoto 606-8502, JapanDepartment of Applied Physics, Nagoya Institute of Technology , Nagoya 466-8555, JapanIn this paper, we study the nonequilibrium dynamics of the Bose–Hubbard model with the nearest-neighbor repulsion by using time-dependent Gutzwiller (GW) methods. In particular, we vary the hopping parameters in the Hamiltonian as a function of time, and investigate the dynamics of the system from the density wave (DW) to the superfluid (SF) crossing a first-order phase transition and vice versa. From the DW to SF, we find scaling laws for the correlation length and vortex density with respect to the quench time. This is a reminiscence of the Kibble–Zurek scaling for continuous phase transitions and contradicts the common expectation. We give a possible explanation for this observation. On the other hand from SF to DW, the system evolution depends on the initial SF state. When the initial state is the ground state obtained by the static GW methods, a coexisting state of the SF and DW domains forms after passing through the critical point. Coherence of the SF order parameter is lost as the system evolves. This is a phenomenon similar to the glass transition in classical systems. When the state starts from the SF with small local phase fluctuations, the system obtains a large size DW domain structure with thin domain walls.https://doi.org/10.1088/1367-2630/aad5f9ultra-cold atomic gasesBose–Hubburd modelquantum dynamical phase transitionfirst-order phase transitionsuperfluiddensity wave |
| spellingShingle | Keita Shimizu Takahiro Hirano Jonghoon Park Yoshihito Kuno Ikuo Ichinose Dynamics of first-order quantum phase transitions in extended Bose–Hubbard model: from density wave to superfluid and vice versa New Journal of Physics ultra-cold atomic gases Bose–Hubburd model quantum dynamical phase transition first-order phase transition superfluid density wave |
| title | Dynamics of first-order quantum phase transitions in extended Bose–Hubbard model: from density wave to superfluid and vice versa |
| title_full | Dynamics of first-order quantum phase transitions in extended Bose–Hubbard model: from density wave to superfluid and vice versa |
| title_fullStr | Dynamics of first-order quantum phase transitions in extended Bose–Hubbard model: from density wave to superfluid and vice versa |
| title_full_unstemmed | Dynamics of first-order quantum phase transitions in extended Bose–Hubbard model: from density wave to superfluid and vice versa |
| title_short | Dynamics of first-order quantum phase transitions in extended Bose–Hubbard model: from density wave to superfluid and vice versa |
| title_sort | dynamics of first order quantum phase transitions in extended bose hubbard model from density wave to superfluid and vice versa |
| topic | ultra-cold atomic gases Bose–Hubburd model quantum dynamical phase transition first-order phase transition superfluid density wave |
| url | https://doi.org/10.1088/1367-2630/aad5f9 |
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