Phys. Rev. Lett. 102, 216803 (2009) [4 pages]Nonequilibrium Transport at a Dissipative Quantum Phase TransitionReceived 23 November 2008; published 28 May 2009 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. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.102.216803
DOI:
10.1103/PhysRevLett.102.216803
PACS:
73.23.−b, 03.65.Yz, 72.15.Qm
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