摘要
We construct a new bipartite entangled state（NBES）,which describes both the squeezing and the entanglement involved in the parametric down-conversion process and can be produced using a symmetric beam splitter.Constructing asymmetric ket-bra integrations based on the NBES leads to some new squeezing operators,which clearly exhibit the relationships between squeezing and entangled state transformations.Moreover,an entangled Wigner operator with a definite physical meaning is also presented.
We construct a new bipartite entangled state（NBES）,which describes both the squeezing and the entanglement involved in the parametric down-conversion process and can be produced using a symmetric beam splitter.Constructing asymmetric ket-bra integrations based on the NBES leads to some new squeezing operators,which clearly exhibit the relationships between squeezing and entangled state transformations.Moreover,an entangled Wigner operator with a definite physical meaning is also presented.
基金
Project supported by the National Natural Science Foundation of China (Grant No. 11147009)
the Natural Science Foundation of Shandong Province,China (Grant Nos. ZR2010AQ027 and ZR2012AM004)
the Shandong Provincial Higher Educational Science and Technology Program,China (Grant No. J10LA15)
