二能级原子对窄带压缩真空激发的响应

Response of a two-Level Atom to a Narrow Bandwidth Squeezed Vacuum Excitation

利用耦合系统法,我们计算了在带宽小于原子自然线宽的压缩真空驱动下的二能级原子的荧光谱和发射谱,结果发现,量子压缩真空场在发射荧光场中会产生压缩,该压缩仅出现在总荧光场无压缩时的压缩谱中.

Using the coupled-system approach we calculate the optical spectra of the fluorescenceand transmitted field of a two-level atom driven by a squeezed vacuum of bandwidths smaller than the natural atomic linewidth.We find that a quantum squeezed-vacuum field produces squeezing in the emitted fluorescence field which appears only in the squeezing spectrum while there is no squeezing in the total field.