Realistic teleportation of coherent states using squeezed vacuum states
Yan Wei(闫伟)a)b)† and Zhang Wei-Jun(张为俊)b)
a Laboratory of Environmental Spectroscopy, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; b Department of Physics, Qufu Normal University, Qufu 273165, China
Abstract This paper presents a realistic scheme for the teleportation of coherent states in which a two-mode squeezed vacuum state serves as the quantum channel and the position-sum and momentum-difference of two local modes serve as the measuring observables. The average fidelity of the teleportation of coherent states is derived for finite squeezing parameters and it turns out that fidelity greater than 1/2 cannot be achieved by using a classical channel alone and the probability distribution of the measurement result is a Gaussian distribution around the unknown parameter of the input coherent state with a width given by the squeezing parameter.
Received: 18 December 2006
Revised: 04 January 2007
Accepted manuscript online:
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