Entanglement Transfer Between Cavity Fields and Excitons in a Driven Quantum Dot System

摘要

＜正＞ We investigate entanglement transfer from two separate cavities to the excitons in two quantum dotsseparately placed in the two cavities.The cavity fields and the excitons are treated as two continuous-variable（CV）subsystems.The time-dependent characteristic functions in the Wigner representation for the two subsystems areanalytically obtained.Under the conditions that one of the two CV subsystems is initially prepared in a two-modesqueezed vacuum state and the other in its lowest energy state,we show that the entanglement reciprocation betweenthe cavity fields and the excitons is realizable.