| Quantum State Sharing by Using Two-Mode and Single-Mode Squeezed State Lights |
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| 作者姓名： | 张俊香 荆杰泰 谢常德 彭堃墀 |
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| 作者单位： | The State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-electronics,Shanxi University, Taiyuan 030006 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant No 60278010, and the Shanxi Natural Science Foundation （No 20041039） and the Returned Scholar Foundation of High Education. |
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| 摘 要： |
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| 关 键 词： | 量子纠缠 量子状态分布 压缩态 信噪比 量子传输 |
| 收稿时间： | 2005-06-09 |
| 修稿时间： | 2005-06-09 |
Quantum State Sharing by Using Two-Mode and Single-Mode Squeezed State Lights |
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| ZHANG Jun-Xiang, JING Jie-Tai, XIE Chang-De, PENG Kun-Chi.Quantum State Sharing by Using Two-Mode and Single-Mode Squeezed State Lights[J].Chinese Physics Letters,2005,22(11):2751-2754. |
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| Authors: | ZHANG Jun-Xiang JING Jie-Tai XIE Chang-De PENG Kun-Chi |
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| Abstract: | We propose a quantum state sharing scheme for continuous variables using bright two-mode squeezed state and single-mode squeezed state light. The squeezing of a single-mode state is applied to enhance the security of information in quantum teleportation network. The signal-to-noise ratio of communication and the fidelity between the secret and reconstruction state are analysed. It is shown that both the receivers of Bob and Charlie cannot extract information with a high signal-to-noise ratio because of the large noise come from the other quadrature component of single mode squeezed state. Anyone of Bob and Charlie can retrieve the quantum state with a high signal-to-noise ratio if and only if the other one cooperates with the measurement. |
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