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.
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]. 中国物理快报, 2005, 22(11): 2751-2754.
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. Chin. Phys. Lett., 2005, 22(11): 2751-2754.
2005, Vol. 22 
