T-C模型中纠缠原子与相干态光场相互作用的量子态保真度

Quantum information fidelity of entangled atoms interacting with coherent state light-field in T-C model

利用全量子理论研究了两个全同的纠缠二能级原子与相干态光场相互作用的量子信息保真度。结果表明:系统、原子和场的保真度随平均光子数的增加而急剧减小;系统和原子的保真度随原子间偶极—偶极相互作用增加而变大且趋于同步,但原子的保真度增大更为明显:原子初始纠缠度对三体系保真度影响并不大。

The quantum information Fidelity of two entangled - atoms interacting with coherent state light - field is studied by means of quantum theory. The results show that quantum information fidelity of system, atoms and light field will drastically decrease as the intensity of field increases. The fidelity of system and field will increase and vary simultaneously with the increasing of atoms＇ dipole - dipole interaction, but the fidelity of atoms will increase obviously. The atoms＇ entanglement has a little influence on the fidelity of system, atom and light field.