原子与双模光场耦合系统纠缠纯化方案

Entanglement purification protocol for the system with atom coupling to two optical cavities

提出了二能级原子与双模光场耦合系统的纠缠纯化方案,并对系统纯化前后量子传输保真度进行了研究。研究表明:通过调整两个量子逻辑门的旋转角度,可以有效地改进相位阻尼和失谐对量子传输保真度的影响,并且获得了通过纯化后的信道进行传输的最大保真度。

The entanglement purification protocol for the system of atom interacting with two distinct optical cavities is discussed. The fidelities before and after the system purification are studied. The results indicate that the effect of the phase decoherence rate and detuning parameter on the fidelity can be reduced by modifying two quantum logical gates. Then, maximal fidelity of quantum teleportation can be achieved.