摘要
Considering three two-level atoms initially in the W or Greenberger-Horne-Zeilinger （GHZ） state, one of the three atoms is put into an initially coherent light cavity and made to resonantly interact with the cavity. The twoatom entanglement evolution outside the cavity is investigated. The influences of state-selective measurement of the atom inside the cavity and strength of the light field on the two-atom entanglement evolution outside the cavity are discussed. The results obtained from the numerical method show that the two-atom entanglement outside the cavity is strengthened through state-selective measurement of the atom inside the cavity. In addition, the strength of the light field also influences the two-atom entanglement properties.
Considering three two-level atoms initially in the W or Greenberger-Horne-Zeilinger （GHZ） state, one of the three atoms is put into an initially coherent light cavity and made to resonantly interact with the cavity. The twoatom entanglement evolution outside the cavity is investigated. The influences of state-selective measurement of the atom inside the cavity and strength of the light field on the two-atom entanglement evolution outside the cavity are discussed. The results obtained from the numerical method show that the two-atom entanglement outside the cavity is strengthened through state-selective measurement of the atom inside the cavity. In addition, the strength of the light field also influences the two-atom entanglement properties.
基金
supported by the Natural Science Foundation of Fujian Province,China (Grant No. 2008J0217)
