期刊
PHYSICAL REVIEW LETTERS
卷 110, 期 25, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.110.257203
关键词
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资金
- Foundation for Fundamental Research on Matter (FOM)
- Netherlands Organisation for Scientific Research (NWO)
- EPSRC [EP/I032487/1, EP/J014885/1]
- National Science Foundation [NSF PHY11-25915]
- Engineering and Physical Sciences Research Council [EP/J014885/1, EP/I032487/1] Funding Source: researchfish
- EPSRC [EP/J014885/1, EP/I032487/1] Funding Source: UKRI
We consider quantum quenches in integrable models. We argue that the behavior of local observables at late times after the quench is given by their expectation values with respect to a single representative Hamiltonian eigenstate. This can be viewed as a generalization of the eigenstate thermalization hypothesis to quantum integrable models. We present a method for constructing this representative state by means of a generalized thermodynamic Bethe ansatz (GTBA). Going further, we introduce a framework for calculating the time dependence of local observables as they evolve towards their stationary values. As an explicit example we consider quantum quenches in the transverse-field Ising chain and show that previously derived results are recovered efficiently within our framework.
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