Entanglement swapping of continuous variable using squeezed vacuum states |
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| Authors: | Yan Wei and Zhang Wei-Jun |
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| Affiliation: | Laboratory of Environmental Spectroscopy, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; Department of Physics, Qufu Normal University, Qufu 273165, China |
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| Abstract: | ![]()
We present a realistic scheme for the entanglement swapping of continuousvariable, in which a two-mode squeezed vacuum state serves as a quantumchannel. The position sum and momentum difference of two local modes aremeasured. By taking the input entangled state also as a two-mode squeezedvacuum state, we investigate the average fidelity and the von Neumannentropy of the output state. The results show that theperfect teleportation can be achieved by increasing the squeezing of the quantum channel and that anynonzero squeezing in both the quantum channel and the input entangled stateis sufficient to swap the entanglement. |
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| Keywords: | entanglement swapping continuous variable squeezedvacuum states |
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