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Title

Quantum quenches in disordered systems: Approach to thermal equilibrium without a typical relaxation time

AuthorsKhatami, Ehsan; Rigol, Marcos; Relaño, Armando; García-García, Antonio M.
Issue Date2012
PublisherAmerican Physical Society
CitationPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics 85 (2012)
AbstractWe study spectral properties and the dynamics after a quench of one-dimensional spinless fermions with short-range interactions and long-range random hopping. We show that a sufficiently fast decay of the hopping term promotes localization effects at finite temperature, which prevents thermalization even if the classical motion is chaotic. For slower decays, we find that thermalization does occur. However, within this model, the latter regime falls in an unexpected universality class, namely, observables exhibit a power-law (as opposed to an exponential) approach to their thermal expectation values. © 2012 American Physical Society.
URIhttp://hdl.handle.net/10261/72751
DOIhttp://dx.doi.org/10.1103/PhysRevE.85.050102
Identifiersdoi: 10.1103/PhysRevE.85.050102
issn: 1539-3755
Appears in Collections:(CFMAC-IEM) Artículos
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