腔场驱动下与声子库相互作用的双量子点的纠缠猝死和操控

he entanglement dynamics of excitons in the two-level double-quantum-dot driven by cavity fields is investigated with the particular attention on the effect of phonon bath which makes an open two-qubit system of the quantum-dot and cavity-field. The time-evolution of the concurrence, which is the entanglement measure of mixed states for the open system, is obtained explicitly as a parameter function of exciton-photon couplings g_{1,2}, the phonon-populations N_{1,2}, and the Huang-Rhys factors Lambda_{1,2}. The entanglement sudden death (ESD) is found and is seen to be manipulated by the parameters,g_{1,2},N_{1,2},and Lambda_{1,2} as well. We moreover demonstrate the condition to suppress the ESD sufficiently.