,Scheme for implementing quantum dense coding with four-particle decoherence-free states in an ion t

• 作 者: Zheng Xiao-Juan Cao Shuai Fang Mao-Fa Liao Xiang-Ping
• 机 构: School of Physics Science and Technology,Central South University,Changsha 410083,China“,”College of
• 出 处: 中国物理B（英文版）
• 发表日期: 2008年2期
• 关键词: entanglement quantum dense coding trapped ions decoherence-free state

This paper proposes an experimentally feasible scheme for implementing quantum dense coding of trapped-ion system in decoherence-free states.As the phase changes due to time evolution of components with different eigenenergies of quantum superposition are completely frozen,quantum dense coding based on this model would be perfect.The scheme is insensitive to heating of vibrational mode and Bell states can be exactly distinguished via detecting the ionic state.