Volume 125, Number 2, January 2019
|Number of page(s)||7|
|Published online||08 February 2019|
Lack of thermalization for integrability-breaking impurities
Institute for Theoretical Physics, University of Amsterdam, Science Park 904 1098 XH Amsterdam, The Netherlands
Received: 14 November 2018
Accepted: 10 January 2019
We investigate the effects of localized integrability-breaking perturbations on the large times dynamics of thermodynamic one-dimensional quantum and classical systems. In particular, we suddenly activate an impurity which breaks the integrability of an otherwise homogeneous system. We focus on the large times dynamics and on the thermalization properties of the impurity, which is shown to have mere perturbative effects even at infinite times, thus preventing thermalization. This is in clear contrast with homogeneous integrability-breaking terms, which display the prethermalization paradigm and are expected to eventually cause thermalization, no matter the weakness of the integrability-breaking term. Analytic quantitative results are obtained in the case in which the bulk Hamiltonian is free and the impurity interacting.
PACS: 02.30.Ik – Integrable systems / 05.30.-d – Quantum statistical mechanics / 05.20.-y – Classical statistical mechanics
© EPLA, 2019
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