Jakobs Severin G, Meden Volker, Schoeller Herbert
Institut für Theoretische Physik A, RWTH Aachen, D-52056 Aachen, Germany.
Phys Rev Lett. 2007 Oct 12;99(15):150603. doi: 10.1103/PhysRevLett.99.150603. Epub 2007 Oct 11.
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.
我们通过在每个库的费米函数或玻色函数中引入一个复数值流参数，在凯尔迪什形式体系内提出了一种非平衡版本的泛函重整化。我们的截断方案为平衡和非平衡情况提供了一种统一的方法。我们将其应用于通过耦合到两个库的相互作用量子线的非平衡输运，并表明非平衡占据为电导引入了新的幂律指数。
