Interaction-driven dynamical quantum phase transitions in a strongly correlated bosonic system
We study dynamical quantum phase transitions (DQPTs) in the extended Bose-Hubbard model after a sudden quench of the nearest-neighbor interaction strength. Using the time-dependent density matrix renormalization group, we demonstrate that interaction-driven DQPTs can appear after quenches between tw...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2022-01-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.4.013002 |
| _version_ | 1797210853203771392 |
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| author | Sebastian Stumper Michael Thoss Junichi Okamoto |
| author_facet | Sebastian Stumper Michael Thoss Junichi Okamoto |
| author_sort | Sebastian Stumper |
| collection | DOAJ |
| description | We study dynamical quantum phase transitions (DQPTs) in the extended Bose-Hubbard model after a sudden quench of the nearest-neighbor interaction strength. Using the time-dependent density matrix renormalization group, we demonstrate that interaction-driven DQPTs can appear after quenches between two topologically trivial insulating phases—a phenomenon that has so far only been studied between gapped and gapless phases. These DQPTs occur when the interaction strength crosses a certain threshold value that does not coincide with the equilibrium phase boundaries, which is in contrast to quenches that involve a change of topology. In order to elucidate the nonequilibrium excitations during the time evolution, we define a new set of string and parity order parameters. We find a close connection between DQPTs and these newly defined order parameters for both types of quenches. In the interaction-driven case, the order parameter exhibits a singularity at the time of the DQPT only when the quench parameter is close to the threshold value. Finally, the timescales of DQPTs are scrutinized and different kinds of power laws are revealed for the topological and interaction-driven cases. |
| first_indexed | 2024-04-24T10:17:11Z |
| format | Article |
| id | doaj.art-5590c8b85b5b4e24b3c0738ac38d5961 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:17:11Z |
| publishDate | 2022-01-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-5590c8b85b5b4e24b3c0738ac38d59612024-04-12T17:16:57ZengAmerican Physical SocietyPhysical Review Research2643-15642022-01-014101300210.1103/PhysRevResearch.4.013002Interaction-driven dynamical quantum phase transitions in a strongly correlated bosonic systemSebastian StumperMichael ThossJunichi OkamotoWe study dynamical quantum phase transitions (DQPTs) in the extended Bose-Hubbard model after a sudden quench of the nearest-neighbor interaction strength. Using the time-dependent density matrix renormalization group, we demonstrate that interaction-driven DQPTs can appear after quenches between two topologically trivial insulating phases—a phenomenon that has so far only been studied between gapped and gapless phases. These DQPTs occur when the interaction strength crosses a certain threshold value that does not coincide with the equilibrium phase boundaries, which is in contrast to quenches that involve a change of topology. In order to elucidate the nonequilibrium excitations during the time evolution, we define a new set of string and parity order parameters. We find a close connection between DQPTs and these newly defined order parameters for both types of quenches. In the interaction-driven case, the order parameter exhibits a singularity at the time of the DQPT only when the quench parameter is close to the threshold value. Finally, the timescales of DQPTs are scrutinized and different kinds of power laws are revealed for the topological and interaction-driven cases.http://doi.org/10.1103/PhysRevResearch.4.013002 |
| spellingShingle | Sebastian Stumper Michael Thoss Junichi Okamoto Interaction-driven dynamical quantum phase transitions in a strongly correlated bosonic system Physical Review Research |
| title | Interaction-driven dynamical quantum phase transitions in a strongly correlated bosonic system |
| title_full | Interaction-driven dynamical quantum phase transitions in a strongly correlated bosonic system |
| title_fullStr | Interaction-driven dynamical quantum phase transitions in a strongly correlated bosonic system |
| title_full_unstemmed | Interaction-driven dynamical quantum phase transitions in a strongly correlated bosonic system |
| title_short | Interaction-driven dynamical quantum phase transitions in a strongly correlated bosonic system |
| title_sort | interaction driven dynamical quantum phase transitions in a strongly correlated bosonic system |
| url | http://doi.org/10.1103/PhysRevResearch.4.013002 |
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