Enregistré dans:
| Auteurs principaux: | , |
|---|---|
| Format: | Preprint |
| Publié: |
2025
|
| Sujets: | |
| Accès en ligne: | https://arxiv.org/abs/2507.05579 |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866908440425660416 |
|---|---|
| author | Mumford, J. Lewis-Swan, R. J. |
| author_facet | Mumford, J. Lewis-Swan, R. J. |
| contents | We investigate dynamical quantum phase transitions (DQPTs) in quantum systems that possess well-defined classical limits, focusing on the spinor Bose-Einstein condensate and the Lipkin-Meshkov-Glick model. We diagnose the DQPTs with the long-time average of the quantum Fisher information (QFI) showing that it abruptly changes at the transition point. Using mean-field and semiclassical approximations, we demonstrate that the long-time average of the QFI reveals universal behavior that persists across different systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_05579 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Universal Long-Time Behavior of the Quantum Fisher Information in Dynamical Quantum Phase Transitions Mumford, J. Lewis-Swan, R. J. Quantum Physics Quantum Gases We investigate dynamical quantum phase transitions (DQPTs) in quantum systems that possess well-defined classical limits, focusing on the spinor Bose-Einstein condensate and the Lipkin-Meshkov-Glick model. We diagnose the DQPTs with the long-time average of the quantum Fisher information (QFI) showing that it abruptly changes at the transition point. Using mean-field and semiclassical approximations, we demonstrate that the long-time average of the QFI reveals universal behavior that persists across different systems. |
| title | Universal Long-Time Behavior of the Quantum Fisher Information in Dynamical Quantum Phase Transitions |
| topic | Quantum Physics Quantum Gases |
| url | https://arxiv.org/abs/2507.05579 |