New approach for constructing generalized entangled state representations

Wen-Jian Yu, Hong‐Chun Yuan, Ji‐Suo Wang

Fan Hong‐Yi, Cheng Hai-Ling

We construct the generalized squeezed vacuum state by virtue of the entangled state [Fan Hongyi and J.R. Klauder, Phys. Rev. A47 (1994) 777] and derive the quantum fluctuation of the two-mode quadrature operators.We then calculate Wigner functions of the two-mode squeezed number states and generalized squeezing vacuum state in a new approach which makes full use of the representation, the results are neater and more concise than those in the literature before.

Hong-Yi Fan, Junhua Chen, Song Tong-Qiang

Ma Shan-Jun, Xue-xiang Xu

A convenient approach for deriving new quantum mechanical coherent-entangled state representations is proposed to construct the integration of unity in normally ordered Gaussian operator forms and then decomposing it as projection operators. As examples, the n-mode complicated entangled state representations are derived and their application is presented.

庞乾骏

Hong-Yi Fan, Lu Hai-Liang

We introduce the so-called coherent-entangled state in the two-mode Fock space; this state exhibits both the properties of the coherent and entangled states. Generalized -representation in the coherent-entangled state is constructed. A protocol for producing the ideal coherent-entangled state is presented. It is shown that the bipartite entangled state can be a superposition of the coherent-entangled states.