封闭结构三能级原子系统中的压缩和纠缠特性

Squeezing and Entanglement of the Output Field from the Closed-loop Atomic System

研究在相干场和微波场驱动下的三能级△型原子与腔模相互作用系统中存在压缩、纠缠特性.通过计算输出场的压缩(纠缠)谱,发现该压缩谱(纠缠谱)的宽度容易受腔衰变系数的影响,而最大压缩(纠缠)度随微波场的增强而减弱,当关闭微波场时,最大压缩度与腔衰变系数无关.这些研究在光通信以及量子信息处理方面有积极意义.

The two-mode squeezing and entanglement of the output fields are generated by a three-level closed-loop atom interacting with two mode of the cavity.From the squeezing spectrum,we find that the width of squeezing（entanglement） spectrum is sensitive to the cavity decay rate.The depth of the the squeezing or entanglement spectrum is dependent on the microwave field.The results can be useful in realizing the controllable quantum communication.