摘要
Entanglement dynamics of two non-interacting atoms in a squeezed vacuum reservoir is studied. Several examples with different initial entangled states ave investigated, and it is found that entangled atoms become disentangled faster in squeezed vacuum than in ordinary vacuum, and larger squeezing results in faster entanglement decay. The time evolution of the concurrence and the separability “distance” Λ can be used to explain this novel entanglement sudden death phenomenon.
Entanglement dynamics of two non-interacting atoms in a squeezed vacuum reservoir is studied. Several examples with different initial entangled states ave investigated, and it is found that entangled atoms become disentangled faster in squeezed vacuum than in ordinary vacuum, and larger squeezing results in faster entanglement decay. The time evolution of the concurrence and the separability “distance” Λ can be used to explain this novel entanglement sudden death phenomenon.
基金
the National Natural Sciences Foundation of China(No.60478002,60578050,and 10523003)and the Key Basic Reseach Foundation of Shanghai(No.04JC14036).X.Feng would also like to acknowledge the support of NUS academic research(No.WBS:R-144-000-189-305).
