非最大量子纠缠信道的量子态传送——在腔QED系统中利用非最大三粒子纠缠GHZ态传送未知原子态

Teleportation of Quantum States with Nonmaximally Entangled Quantum Channel——Teleportation of an Unknown Atom State Via a Tripartite Nonmaximally Entangled GHZ State in Cavity QED

讨论在腔QED中如何利用非最大三粒子纠缠GHZ态实现未知单原子态、两原子纠缠态的概率隐形传送.在量子态传送过程中需要引入一个辅助粒子以解决使用非最大纠缠量子信道导致的态畸变问题.本方案在两原子与腔相互作用的整个过程中,由于经典场同时对两原子进行驱动,量子态的演化不依赖于腔场的态,因而不受腔泄漏和热腔场的影响.

The article discusses a probability teleportation scheme for an unknown singleatom state and an unknown two-atom entangled state via a tripartite nonmaximally entangled GHZ state in cavity QED. In the process of teleportation of quantum states we have to introduce an ancillary qubit to solve quantum state distortion problems caused by the use of nonmaximally entangled quantum channel. In this scheme, the two identical two-level atoms simultaneously interact with a single-mode cavity and are driven by a strongly classical field. The atomic state evolution is independent of the cavity field state and not affected by the cavity decay and the thermal field.