学术
Entanglement swapping of continuous variable using squeezed vacuum states
闫伟[1,2] 张为俊[1]
[1]Laboratory of Environmental Spectroscopy, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China [2]Department of Physics, Qufu Normal University, Qufu 273165, China
文章出处:
《中国物理：英文版》-2007年16卷10期 -2885-2888页
分 类 号:
Entanglement swapping of continuous variable using squeezed vacuum states
Yan Weiand Zhang Wei-Jun（ 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:
We present a realistic scheme for the entanglement swapping of continuous variable, in which a two-mode squeezed vacuum state serves as a quantum channel. The position sum and momentum difference of two local modes are measured. By taking the input entangled state also as a two-mode squeezed vacuum state, we investigate the average fidelity and the yon Neumann entropy of the output state. The results show that the perfect teleportation can be achieved by increasing the squeezing of the quantum channel and that any nonzero squeezing in both the quantum channel and the input entangled state is sufficient to swap the entanglement.[著者文摘]
Key words:
entanglement swapping, continuous variable, squeezed vacuum states
基金资助:
Project supported by the National Natural Science Foundation of China （Grant No 20477043）.
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