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Hawking radiation and nonequilibrium quantum critical current noise

Sonner, J; Green, AG; (2012) Hawking radiation and nonequilibrium quantum critical current noise. Physical Review Letters , 109 (9) , Article 091601. 10.1103/PhysRevLett.109.091601. Green open access

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Abstract

The dynamical scaling of quantum critical systems in thermal equilibrium may be inherited in the driven steady state, leading to universal out-of-equilibrium behavior. This attractive notion has been demonstrated in just a few cases. We demonstrate how holography—a mapping between the quantum critical system and a gravity dual—provides an illuminating perspective and new results. Nontrivial out-of-equilibrium universality is particularly apparent in current noise, which is dual to Hawking radiation in the gravitational system. We calculate this in a two-dimensional system driven by a strong in-plane electric field and deduce a universal scaling function interpolating between previously established equilibrium and far-from-equilibrium current noise. Since this applies at all fields, out-of-equilibrium experiments no longer require very high fields for comparison with theory.

Type: Article
Title: Hawking radiation and nonequilibrium quantum critical current noise
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.109.091601
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.109.091601
Language: English
Additional information: © 2012 American Physical Society PubMed ID: 23002819
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/1345889
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