title: Nonequilibrium transport at a dissipative quantum phase transition.
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.
authors.affiliation: Electrophysics Department, National Chiao-Tung University, HsinChu, Taiwan.
authors.forename: Chung-Hou
authors.initials: CH
authors.lastname: Chung
authors.forename: Karyn
authors.initials: K
authors.lastname: Le Hur
authors.forename: Matthias
authors.initials: M
authors.lastname: Vojta
authors.forename: Peter
authors.initials: P
authors.lastname: Wölfle