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A thermal quench induces spatial inhomogeneities in a holographic superconductor

By U.K. CB3 0HE Cambridge JJ Thomson Avenue University of Cambridge Antonio M. García-GarcíaCavendish Laboratory, Portugal) 1049-001 Lisboa Av. Rovisco Pais Universidade Técnica de Lisboa Instituto Superior Técnico Hua Bi Zeng(CFIF and Portugal) 1049-001 Lisboa Av. Rovisco Pais Universidade Técnica de Lisboa Instituto Superior Técnico Hai-Qing Zhang(CFIF

Abstract

Holographic duality is a powerful tool to investigate the far-from equilibrium dynamics of superfluids and other phases of quantum matter. For technical reasons it is usually assumed that, after a quench, the far-from equilibrium fields are still spatially uniform. Here we relax this assumption and study the time evolution of a holographic superconductor after a temperature quench but allowing spatial variations of the order parameter. Even though the initial state and the quench are spatially uniform we show the order parameter develops spatial oscillations with an amplitude that increases with time until it reaches a stationary value. The free energy of these inhomogeneous solutions is lower than that of the homogeneous ones. Therefore the former corresponds to the physical configuration that could be observed experimentally

Year: 2014
DOI identifier: 10.1007/JHEP07(2014)096
OAI identifier: oai:www.openaccessrepository.it:8685

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