Dynamical relaxation behavior of extended XY chain with gapless phase following a quantum quench
2023
academicJournal
Zugriff:
We investigate the dynamical relaxation behavior of the two-point correlation in extended XY models with a gapless phase after quenches from various initial states. Specifically, we study the XY chain with gapless phase induced by the additional interactions: Dzyaloshinskii-Moriya interaction and XZY-YZX type of three-site interaction. When quenching from the gapped phase, we observe that the additional interactions have no effect on the relaxation behavior. The relaxation behavior is $\delta C_{mn}(t)\sim t^{-3/2}$ and $\sim t^{-1/2}$ for the quench to the commensurate phase and the incommensurate phase, respectively. However, when quenching from the gapless phase, we demonstrate that the scaling behavior of $\delta C_{mn}(t)$ is changed to $\sim t^{-1}$ for the quench to the commensurate phase, and the decay of $\delta C_{mn}(t)$ follows $\sim t^{-1}$ or $\sim t^{-1/2}$ for the quench to the incommensurate phase depending on the parameters of pre-quench Hamiltonian. We also establish the dynamical phase diagrams based on the dynamical relaxation behavior of $\delta C_{mn}(t)$ in the extended XY models. ; Comment: 12 pages, 10 figures
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Dynamical relaxation behavior of extended XY chain with gapless phase following a quantum quench
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Autor/in / Beteiligte Person: | Cao, Kaiyuan ; Hu, Yayun ; Tong, Peiqing ; Yang, Guangwen |
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Veröffentlichung: | 2023 |
Medientyp: | academicJournal |
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