Imaginary-time formulation of steady-state nonequilibrium: application to strongly correlated transport.
We extend the imaginary-time formulation of the equilibrium quantum many-body theory to steady-state nonequilibrium with an application to strongly correlated transport. By introducing the Matsubara voltage, we maintain the finite chemical potential shifts in the Fermi-Dirac function, in agreement with the Keldysh formulation. The formulation is applied to strongly correlated transport in the Kondo regime using the quantum Monte Carlo method.
Han
J E
JE
Department of Physics, State University of New York at Buffalo, Buffalo, New York 14260, USA.
Heary
R J
RJ