Long range correlations in the non-equilibrium quantum relaxation of a spin chain

Abstract

We consider the non-stationary quantum relaxation of the Ising spin chain in a transverse field of strength h. Starting from a homogeneously magnetized initial state the system approaches a stationary state by a process possessing quasi long range correlations in time and space, independent of the value of $h$. In particular the system exhibits aging (or lack of time translational invariance on intermediate time scales) although no indications of coarsening are present.

4 pages RevTeX, 2 eps-figures included

References in corpus (2)

• Quantum aging in mean-field models
• Lattice field theories with an energy current

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