无相互作用原子之间的纠缠和量子失协

Entanglement and Quantum Discord Between Two Noninteracting Atoms

研究两个无相互作用的二能级原子分别与单模热光场相互作用时的纠缠和量子失协动力学,重点讨论原子运动和腔体热环境温度对纠缠和量子失协的影响。结果表明:受原子运动和场模结构参数的影响,两原子的纠缠和量子失协周期性地演化;在原子纠缠消失处仍存在量子失协。此外,通过控制腔体热环境温度和场模结构参数可以实现对纠缠和量子失协的调控,使其得以保持。

This paper investigated the quantum entanglement and quantum di noninteracting moving two-level atoms each interacting with a single-mode thermal the effect of the atomic motion and the temperature of the thermal cavity field on en discord. The results showed that, the entanglement and quantum discord evolved p scord cavity dynamics of two field, and studied tanglement and quantum eriodically with time due to the atomic motion and the field-mode structure parameter. The quantum discord still can capture the quantum correlation when the entanglement is zero. In addition, the entanglement and quantum discord can be effectively preserved by controlling the temperature of the thermal cavity field and the field- mode structure parameter.