期刊
PHYSICAL REVIEW B
卷 89, 期 16, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.89.165104
关键词
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资金
- EPSRC [EP/I032487/1, EP/J014885/1]
- Deutsche Forschungsgemeinschaft (DFG) [SFB 1073]
- EPSRC [EP/J014885/1, EP/I032487/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/J014885/1, EP/I032487/1] Funding Source: researchfish
We consider quantum quenches in an integrable quantum chain with tuneable-integrability-breaking interactions. In the case where these interactions are weak, we demonstrate that at intermediate times after the quench local observables relax to a prethermalized regime, which can be described by a density matrix that can be viewed as a deformation of a generalized Gibbs ensemble. We present explicit expressions for the approximately conserved charges characterizing this ensemble. We do not find evidence for a crossover from the prethermalized to a thermalized regime on the time scales accessible to us. Increasing the integrability-breaking interactions leads to a behavior that is compatible with eventual thermalization.
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