科研之友
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摘要
An efficient periodic operation to obtain the maximum work from a nonequilibrium initial state in an N-level quantum system is shown. Each cycle consists of a stabilization process followed by an isentropic restoration process. The instantaneous time limit can be taken in the stabilization process from the nonequilibrium initial state to a stable passive state. In the restoration process that preserves the passive state a minimum period is needed to satisfy the uncertainty relation between energy and time. An efficient quantum feedback control in a symmetric two-level quantum system connected to an energy source is proposed.
- 出版日期2014-6
