Effective thermal dynamics following a quantum quench in a spin chain

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dc.creatorRossini, Davide
dc.creatorSilva, Alessandro
dc.creatorMussardo, Giuseppe
dc.creatorSantoro, Giuseppe
dc.date2008-10-30
dc.date2009-03-27
dc.date.accessioned2026-07-07T12:56:46Z
dc.date.available2026-07-07T12:56:46Z
dc.descriptionWe study the nonequilibrium dynamics of the Quantum Ising Model following an abrupt quench of the transverse field. We focus on the on-site autocorrelation function of the order parameter, and extract the phase coherence time $τ^ϕ_Q$ from its asymptotic behavior. We show that the initial state determines $τ^ϕ_Q$ only through an effective temperature set by its energy and the final Hamiltonian. Moreover, we observe that the dependence of $τ^ϕ_Q$ on the effective temperature fairly agrees with that obtained in thermal equilibrium as a function of the equilibrium temperature.
dc.description4 pages, 4 figures. Published version
dc.identifierhttps://arxiv.org/abs/0810.5508
dc.identifierhttp://arxiv.org/abs/0810.5508
dc.identifierPhys. Rev. Lett. 102, 127204 (2009)
dc.identifierdoi:10.1103/PhysRevLett.102.127204
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/224696
dc.subjectStatistical Mechanics
dc.subjectQuantum Physics
dc.titleEffective thermal dynamics following a quantum quench in a spin chain
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