非旋波近似下光场与V型三能级原子依赖强度耦合作用系统中的光场压缩

利用全量子理论,研究了非旋波近似下单模光场与V型三能级原子依赖强度耦合的相互作用系统中光场的压缩效应.结果表明:光场的压缩依赖于系统的本身性质,而虚光子过程使光场的压缩程度明显加强并产生量子噪声,其大小依赖于初始场平均光子数n和光场频率ω,且与原子光场耦合强度g有关.

Light squeezing in the intensity dependent coupling interaction between light field and the V type three level atom without rotating wave approximation

We propose an experimentally feasible scheme to implement the optimal asymmetric economical 1->3 phase-covariant cloning, which works without ancilla, based on cavity QED. In our scheme, two of the three atoms simultaneously interact with a cavity field and they are driven by classical fields. The scheme is insensitive to the cavity field states and the cavity decay. Therefore, it may be realized in experiment.