利用Akaike信息准则研究退相位对量子干涉的操控作用

Investigation of the Manipulation of Quantum Interference Via Dephasing using Akaike Information Criterion

量子干涉(QI)和Autler-Townes分裂(ATS)是原子-光相互作用系统中的两种不同效应。在电磁诱导透明(EIT)系统中,当耦合光强度适中时,二者会同时存在。一般以耦合光拉比频率作为定性区分QI与ATS的依据,同时Akaike信息准则(AIC)可用于量化二者的相对权重。本文基于AIC方法研究了原子系统中退相位对QI和ATS权重的操控作用。研究表明,通过调节退相位率,可以实现QI和ATS之间的相互转换,以及相消干涉和相长干涉之间的相互转变。利用耦合光和探针光之间的相位关联可以实现退相位的精确操控,由此改变QI和ATS的权重,进而达到QI效应的极大增强。

Quantum interference(QI)and Autler-Townes splitting(ATS)are two different effects in atom-field interaction systems.In an electromagnetically induced transparency(EIT)system,when the intensity of the coupling field is moderate,these two effects exist simultaneously.The coupling field Rabi frequency is generally responsible for distinguishing them,and Akaike information criterion(AIC)can be used to quantificationally determine their relative weights.Here,we investigate the manipulation of QI with dephasing in atomic systems based on AIC method.We find that by adjusting the dephasing rates,the transition between QI and ATS,and the transition between destructive and constructive interference can be observed.The precision control of dephasing can be realized by using the phase correlation between the coupling and probe fields,allowing the changing of the weights of QI and ATS,and the greatly enhancement of QI.This enhancement effect has a practical significance on quantum technology.