Nonequilibrium functional renormalization group for interacting quantum systems

Abstract

We propose a nonequilibrium version of functional renormalization within the Keldysh formalism by introducing a complex valued flow parameter in the Fermi or Bose functions of each reservoir. Our cutoff scheme provides a unified approach to equilibrium and nonequilibrium situations. We apply it to nonequilibrium transport through an interacting quantum wire coupled to two reservoirs and show that the nonequilibrium occupation induces new power law exponents for the conductance.

5 pages, 2 figures; published version

References in corpus (4)

• Exact evolution equation for the effective potential
• Nonequilibrium quantum criticality in open electronic systems
• Functional renormalization group for non-equilibrium quantum many-body problems
• Impurity and correlation effects on transport in one-dimensional quantum wires

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