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arXiv quant-ph/9907048quant-ph
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通过条件测量的光子减法改进连续变量隐形传态

Continuous-variable teleportation improvement by photon subtraction via conditional measurement

T. Opatrny, G. Kurizki, D. -G. Welsch

摘要:

我们证明了最近提出的连续变量隐形传态方案[SL Braunstein和H.J.Kimble,Phys.Rev.Lett. 80,869(1998)]可以通过在由发送者和接收者共享的纠缠态的制备中的条件测量来改进。有条件测量从原始纠缠双模压缩真空中减去光子,通过将每个模式传输通过低反射率分束器并对反射光束进行联合光子数测量。通过这种方式,共享态的纠缠度增加,传送态的保真度也增加。

英文摘要:

We show that the recently proposed scheme of teleportation of continuous variables [S.L. Braunstein and H.J. Kimble, Phys. Rev. Lett. 80, 869 (1998)] can be improved by a conditional measurement in the preparation of the entangled state shared by the sender and the recipient. The conditional measurement subtracts photons from the original entangled two-mode squeezed vacuum, by transmitting each mode through a low-reflectivity beam splitter and performing a joint photon-number measurement on the reflected beams. In this way the degree of entanglement of the shared state is increased and so is the fidelity of the teleported state.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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