JCM迭加态中的非经典光场效应

Non-classical Effects of Light Feild in JCM Superposition States

本文提出了一种迭加态,它是由Jaynes-Cummings模型的两个修饰态和一个基态的线性组合构成的。进而从初态和含时两个方面研究了这种迭加态的量子统计性质。结果表明,当n=0时存在着亚泊松光子统计及压缩态,光子数方差和光场的任一个正交分量的方差可分别低至-1和0.75;当n=1时只存在压缩态,光场的任一个正交分量的方差低至0.42;当n>1时两者均不存在。最后指出了上述理论研究的实际意义。

We present a class of the superposition states, which are formed by a implementation of linear composition of two dressed states and one ground state for the Jaynes-Cummings model. The quantum statistical properties for this class of the superposition states are then investigated in terms of both of initial-state and time-dependence. In conclusion, both sub-Poissonian photon statistics and squeezed states occur for n=0, and the minimum attainable variances in photon number and either quadratures are-1 and 0.75, respectively. Only squeezed states occur for n=1, and the minimum attainable variance in either quadratures is about 0.42. Neither sub-Poissonian photon statistics nor squeezed State occurs for n>1. Finally, the practicality of theoretical studies above mentioned is pointed out.