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Quantum State Sharing by Using Two-Mode and Single-Mode Squeezed State Lights |
| ZHANG Jun-Xiang;JING Jie-Tai;XIE Chang-De;PENG Kun-Chi |
| The State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-electronics,
Shanxi University, Taiyuan 030006 |
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| Cite this article: |
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ZHANG Jun-Xiang, JING Jie-Tai, XIE Chang-De et al 2005 Chin. Phys. Lett. 22 2751-2754 |
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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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| Keywords:
03.67.Hk
42.50.Dv
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Published: 01 November 2005
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| PACS: |
03.67.Hk
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(Quantum communication)
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42.50.Dv
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(Quantum state engineering and measurements)
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