Universal postquench prethermalization at a quantum critical point

Pia Gagel, Peter P. Orth, Jörg Schmalian

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

We consider an open system near a quantum critical point that is suddenly moved towards the critical point. The bath-dominated diffusive nonequilibrium dynamics after the quench is shown to follow scaling behavior, governed by a critical exponent that emerges in addition to the known equilibrium critical exponents. We determine this exponent and show that it describes universal prethermalized coarsening dynamics of the order parameter in an intermediate time regime. Implications of this quantum critical prethermalization are: (i) a power law rise of order and correlations after an initial collapse of the equilibrium state and (ii) a crossover to thermalization that occurs arbitrarily late for sufficiently shallow quenches.

Original languageEnglish (US)
Article number220401
JournalPhysical Review Letters
Volume113
Issue number22
DOIs
StatePublished - Nov 26 2014

Fingerprint Dive into the research topics of 'Universal postquench prethermalization at a quantum critical point'. Together they form a unique fingerprint.

Cite this