光场组合算符激发混沌场的量子特性

Quantum Properties of State via Operation of Light Field Combination Operator on Chaotic Field

利用算符作用在光场态上构造新的量子态的方法,通过光场湮没和产生算符的线性组合作用构造了光场组合算符激发混沌场。通过对光场的两个正交分量涨落、二阶关联函数、Mandel Q参量和Wigner函数的计算,研究了该量子态的压缩效应、反聚束效应、统计性质和Wigner函数的负性。讨论了算符叠加系数变化和平均光子数变化对其量子特性的影响。研究结果表明:光场不呈现压缩效应;随平均光子数增大它的反聚束效应、亚泊松分布性质和Wigner函数负性减弱;另一方面,随算符组合部分中产生算符的比重增大,光场反聚束效应和亚泊松分布性质增强。这表明增大算符组合部分中产生算符的比重对增强光场反聚束效应和亚泊松分布性质有利。

Light field combination operator excited chaotic field is constructed by operation of light field combination operator on chaotic field. Its squeezing, antibunching effect, statistical property and negativity of Wigner function are analysed by calculating two orthogonal components of the light field fluctuations, secondorder correlation function, Mandel Q parameters and Wigner function, respectively. The influences of superposition coefficient of operators and the average photon number of the field on quantum properties are discussed. Results show that the nonclassical property of the field is weakened with the increase of average photon number of the field. On the other hand, its antibunching effect and sub-poissonian statistical property are strengthened as the ratio of photon addition operator in superposition operation increases. The result shows that the increase of the ratio of photon addition operator in superposition operation can help strengthen antibunching effect and sub-poissonian distribution property.