The dependence of fidelity on the squeezing parameter in teleportation of the squeezed coherent states
Jingtao Zhang, Guangqiang He, Li-Jie Ren, Guihua Zeng · Chinese Physics B · 2011
This paper investigates an analytical expression of teleportation fidelity in the teleportation scheme of a single mode of electromagnetic field. The fidelity between the original squeezed coherent state and the teleported one is expressed in terms of the squeezing parameter r and the quantum channel parameter (two-mode squeezed state) p . The results of analysis show that the fidelity increases with the increase of the quantum channel parameter p , while the fidelity decreases with the increase of the squeezing parameter r of the squeezed state. Thus the coherent state ( r = 0) is the best quantum signal for continuous variable quantum teleportation once the quantum channel is built.