Numerically Exact Long Time Magnetization Dynamics at the Nonequilibrium   Kondo Crossover of the Anderson Impurity Model
  We investigate the dynamical and steady-state spin response of the nonequilibrium Anderson model to magnetic fields, bias voltage, and temperature using a numerically exact method combining a bold-line quantum Monte Carlo technique with the memory function formalism. We obtain converged results in a range of previously inaccessible regimes, in particular the crossover to the Kondo domain. We provide detailed predictions for novel nonequilibrium phenomena, including non-monotonic temperature dependence of observables at high bias voltage and oscillatory quench dynamics at high magnetic fields. 
Guy Cohen, Emanuel Gull, David R. Reichman, Andrew J. Millis and Eran   Rabani
cond-mat.str-el cond-mat.mes-hall