Sebastian Deffner, Eric Lutz
We derive a Margolus-Levitin type bound on the minimal evolution time of an open quantum system arbitrarily driven. We express this quantum speed limit time in terms of the operator norm of the nonunitary generator of the dynamics. We apply these results to the damped Jaynes-Cummings model and demonstrate that the corresponding bound is tight. We further show that non-Markovian effects can speed up quantum evolution and therefore lead to a smaller quantum speed limit time.
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http://arxiv.org/abs/1302.5069
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