Quantum correlation of an optically controlled quantum system

摘要

A precise time-dependent control of a quantum system relies on an accurateaccount of the quantum interference among the system, the control and theenvironment. A diagrammatic technique has been recently developed to preciselycalculate this quantum correlation for a fast multimode coherent photon controlagainst slow relaxation, valid for both Markovian and non-Markovian systems. Wereview this formalism in comparison with the existing approximate theories andextend it to cases with controls by photon state other than the coherent state.