激发双参数变形奇偶相干态的反聚束效应

Antibunching Effect of the Excited Two-Parameter Deformed Even and Odd Coherent States

通过在双参数变形奇偶qs相干态上重复作用玻色产生算符,构造了激发奇qs相干态aqs+m|α〉qso和激发偶qs相干态aqs+m|α〉qse,并用数值计算研究了参数m,s和q对反聚束效应的影响.结果显示:(1)当r较小时,对于偶qs相干态,激发可使原来强烈的聚束效应变为强烈的反聚束效应;(2)当q(q≤1)偏离1较远时,随着r2的增大,二阶qs相关函数出现振荡现象(即反聚束效应和聚束效应交替出现),其振幅和周期都随s和q的减小而增大,但不明显受m的调节;(3)当q→1时,二阶相关函数同样出现振荡现象,其振幅和周期不但随着s的减小而增大,而且明显地受到参数m的调节;(4)对于大多数r,二阶qs相关函数对s的敏感度大于对q的敏感度.

The excited odd qs-coherent state and excited even qs-coherent state are constructed. The q , s , and m dependences of the antibunching effect are numerically studied. It is shown that for small r , the excited even qs-coherent state exhibits strong antibunching effect but the even qs-coherent state exhibits strong bunching effect; When the q ( q ≤ 1) is far from 1, as r2 increase, the second-order qs-correlation function exhibits oscillating phenomenon (i.e. alternates between antibunching effect and bunching effect) , whose amplitude and period increase as s and q decrease, but are approximately independent of m; When q→1, the second-order qs-correlation function also exhibits oscillating phenomenon, whose amplitude and period not only increase as 5 decreases but also are dependent on m; In general, the second-order qs -correlation function is more sensitive to s than to q .