Green, AG;
Sondhi, SL;
(2005)
Nonlinear quantum critical transport and the Schwinger mechanism for a superfluid-Mott-insulator transition of bosons.
PHYS REV LETT
, 95
(26)
, Article 267001. 10.1103/PhysRevLett.95.267001.
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Abstract
Scaling arguments imply that quantum-critical points exhibit universal nonlinear responses to external probes. We investigate the origins of such nonlinearities in transport, which is especially problematic since the system is necessarily driven far from equilibrium. We argue that for a wide class of systems the new ingredient that enters is the Schwinger mechanism-the production of carriers from the vacuum by the applied field-which is then balanced against a scattering rate that is itself set by the field. We show by explicit computation how this works for the case of the symmetric superfluid-Mott insulator transition of bosons.
| Type: | Article |
|---|---|
| Title: | Nonlinear quantum critical transport and the Schwinger mechanism for a superfluid-Mott-insulator transition of bosons |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.95.267001 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.95.267001 |
| Language: | English |
| Additional information: | © 2005 The American Physical Society |
| Keywords: | NONZERO-TEMPERATURE TRANSPORT, CRITICAL-POINTS, FILMS, ATOMS |
| UCL classification: | UCL 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: | https://discovery.ucl.ac.uk/id/eprint/1333475 |
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