Markovian Quantum Master Equation beyond Adiabatic Regime
  By introducing a temporal change timescale $\tau_{\text{A}}(t)$ for the time-dependent system Hamiltonian, a general formulation of the Markovian quantum master equation is given to go well beyond the adiabatic regime. In appropriate situations, the framework is well justified even if $\tau_{\text{A}}(t)$ is faster than the decay timescale of the bath correlation function. An application to the dissipative Landau-Zener model demonstrates this general result. The findings are applicable to a wide range of fields, providing a basis for quantum control beyond the adiabatic regime. 
Makoto Yamaguchi, Tatsuro Yuge, Tetsuo Ogawa
cond-mat.stat-mech cond-mat.mes-hall cond-mat.supr-con quant-ph