QUANTUM CONTROL OF TWO-QUBIT ENTANGLEMENT DISSIPATION

摘要

We investigate quantum control of the dissipation of entanglement under environmental decoherence. We show by means of a simple two-qubit model that standard control methods - coherent or open-loop control - will not in general prevent entanglement loss induced by a Markovian environment. However, we propose a control method utilizing a Wiseman-Milburn feedback/measurement control scheme which will effectively negate environmental entanglement dissipation.