TY - JOUR
T1 - Quantum quenches in disordered systems
T2 - Approach to thermal equilibrium without a typical relaxation time
AU - Khatami, Ehsan
AU - Rigol, Marcos
AU - Relaño, Armando
AU - García-García, Antonio M.
PY - 2012/5/15
Y1 - 2012/5/15
N2 - We 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.
AB - We 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.
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U2 - 10.1103/PhysRevE.85.050102
DO - 10.1103/PhysRevE.85.050102
M3 - Article
AN - SCOPUS:84861887085
SN - 1539-3755
VL - 85
JO - Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
JF - Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
IS - 5
M1 - 050102
ER -