A time-dependent coarse-grained master equation is shown to be completely positive and to have controlled error bounds depending only on bath correlation time and decoherence timescale, not level spacing.
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Completely positive master equation for arbitrary driving and small level spacing
A time-dependent coarse-grained master equation is shown to be completely positive and to have controlled error bounds depending only on bath correlation time and decoherence timescale, not level spacing.