  We consider the dynamics of a quantum system immersed in a dilute gas at
thermodynamics equilibrium using a quantum Markovian master equation derived by
applying the low-density limit technique. It is shown that the Gibbs state at
the bath temperature is always stationary while the detailed balance condition
at this state can be violated beyond the Born approximation. This violation is
generically related to the absence of time-reversal symmetry for the scattering
T-matrix, which produces a thermalization mechanism that allows the presence of
persistent probability and heat currents at thermal equilibrium. This
phenomenon is illustrated by a model of an electron hopping between three
quantum dots in an external magnetic field.
