# Quantum Critical States and Phase Transitions in the Presence of Non-Equilibrium Noise

 dc.contributor.author Torre, Emanuele dc.contributor.author Giamarchi, Thierry dc.contributor.author Altman, Ehud dc.contributor.author Demler, Eugene A. dc.date.accessioned 2012-01-23T19:15:03Z dc.date.issued 2010 dc.identifier.citation Torre, Emanuele, Eugene Demler, Thierry Giamarchi, and Ehud Altman. 2010. Quantum critical states and phase transitions in the presence of non-equilibrium noise. Nature Physics 6(10): 806-810. en_US dc.identifier.issn 1745-2481 en_US dc.identifier.uri http://nrs.harvard.edu/urn-3:HUL.InstRepos:8005349 dc.description.abstract Quantum critical points are characterized by scale invariant correlations and correspondingly long-ranged entanglement. As such, they present fascinating examples of quantum states of matter, the study of which has been an important theme in modern physics. Nevertheless very little is known about the fate of quantum criticality under non-equilibrium conditions. In this paper we investigate the effect of external noise sources on quantum critical points. It is natural to expect that noise will have a similar effect to finite temperature, destroying the subtle correlations underlying the quantum critical behavior. Surprisingly we find that in many interesting situations the ubiquitous $$1/f$$ noise preserves the critical correlations. The emergent states show intriguing interplay of intrinsic quantum critical and external noise driven fluctuations. We demonstrate this general phenomenon with specific examples in solid state and ultracold atomic systems. Moreover our approach shows that genuine quantum phase transitions can exist even under non equilibrium conditions. en_US dc.description.sponsorship Physics en_US dc.language.iso en_US en_US dc.publisher Nature Publishing Group en_US dc.relation.isversionof doi:10.1038/nphys1754 en_US dc.relation.hasversion http://arxiv.org/abs/0908.0868 en_US dash.license OAP dc.subject quantum physics en_US dc.subject statistical physics en_US dc.subject thermodynamics en_US dc.subject nonlinear dynamics en_US dc.title Quantum Critical States and Phase Transitions in the Presence of Non-Equilibrium Noise en_US dc.type Journal Article en_US dc.description.version Author's Original en_US dc.relation.journal Nature Physics en_US dash.depositing.author Demler, Eugene A. dc.date.available 2012-01-23T19:15:03Z

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