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Author Sotiriadis, Spyros ♦ Cardy, John
Source arXiv.org
Content type Text
File Format PDF
Date of Submission 2008-08-01
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Natural sciences & mathematics ♦ Mathematics ♦ Physics
Subject Keyword Condensed Matter - Statistical Mechanics ♦ Condensed Matter - Strongly Correlated Electrons ♦ High Energy Physics - Theory ♦ Mathematical Physics ♦ math ♦ physics:cond-mat ♦ physics:hep-th ♦ physics:math-ph
Abstract We study the problem of a quantum quench in which the initial state is the ground state of an inhomogeneous hamiltonian, in two different models, conformal field theory and ordinary free field theory, which are known to exhibit thermalisation of finite regions in the homogeneous case. We derive general expressions for the evolution of the energy flow and correlation functions, as well as the entanglement entropy in the conformal case. Comparison of the results of the two approaches in the regime of their common validity shows agreement up to a point further discussed. Unlike the thermal analogue, the evolution in our problem is non-diffusive and can be physically interpreted using an intuitive picture of quasiparticles emitted from the initial time hypersurface and propagating semiclassically.
Description Reference: J. Stat. Mech. (2008) P11003
Educational Use Research
Learning Resource Type Article
Page Count 30


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