Optimal control of open quantum systems: cooperative effects of driving and dissipation

摘要

We investigate the optimal control of open quantum systems, in particular,the mutual influence of driving and dissipation. A stochastic approach toopen-system control is developed, using a generalized version of Krotov'siterative algorithm, with no need for Markovian or rotating-waveapproximations. The application to a harmonic degree of freedom revealscooperative effects of driving and dissipation that a standard Markoviantreatment cannot capture. Remarkably, control can modify the open-systemdynamics to the point where the entropy change turns negative, thus achievingcooling of translational motion without any reliance on internal degrees offreedom.