远距离三原子量子纠缠特性与其应用

Quantum entanglement of three atoms in long distance and its application

三原子分别被束缚在用光纤环形连接单侧泄漏微光学腔场中,在微腔中输入激光驱动场和施加局域激光场,利用输入-输出技术及绝热近似理论,推导出一维Ising链模型的有效哈密顿量,该哈密顿量表明该系统会诱导出三原子中的任意两原子纠缠及三原子纠缠,用伴随数(concurrence)度量两原子纠缠,用内禀纠缠度量三原子纠缠,通过数值计算,给出两原子和三原子纠缠随时间演化曲线,通过适当调控激光驱动场和局域激光场,在远距离三原子中任意两原子实现未知量子态的隐形传送.

The effective Hamiltonian of the one-dimensional Ising chain model is derived using a laser-driven field and a local laser field in a three-atom trapped micro-optical cavity field connected to a single-sided leak with an optical fiber ring by using the input-output technique and adiabatic approximation theory.The Hamiltonian shows that the system can induce any two atom entanglement and three atom entanglement in three atoms.The two-atom entanglement is measured by the concurrence,and the three-atom entanglement is measured by intrinsic entanglement.The evolution curves of entanglement of two and three atoms with time are given by numerical calculation.The laser driving field and the local laser field can be adjusted properly,the teleportation of unknown quantum state can be realized by any two atoms in a long distance three atoms.