Title: Nonequilibrium Transport at a Dissipative Quantum Phase Transition
Authors: Chung, Chung-Hou
Le Hur, Karyn
Vojta, Matthias
Woelfle, Peter
Department of Electrophysics
Issue Date: 29-May-2009
Abstract: We investigate the nonequilibrium transport near a quantum phase transition in a generic and relatively simple model, the dissipative resonant level model, that has many applications for nanosystems. We formulate a rigorous mapping and apply a controlled frequency-dependent renormalization group approach to compute the nonequilibrium current in the presence of a finite bias voltage V and a finite temperature T. For V -> 0, we find that the conductance has its well-known equilibrium form, while it displays a distinct nonequilibrium profile at finite voltage.
URI: http://dx.doi.org/10.1103/PhysRevLett.102.216803
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.102.216803
Volume: 102
Issue: 21
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