光学学报, 2017, 37 (2): 0227001, 网络出版: 2017-02-13
精确求解与Λ型原子作用二项式光场的量子特性 下载: 536次
Exact Solution for Quantum Properties of the Binomial States Field Interacting with the Λ-Type Atom
量子光学 Λ型三能级原子 非旋波近似 二阶相干度 光场压缩效应 quantum optics Λ-type three-level atom non-rotating wave approximation second-order coherence degree field squeezing effect
摘要
在非旋波近似下,对二项式光场与Λ型三能级原子相互作用的量子特性进行了精确求解。讨论了二项式光场系数以及初始时刻原子能级的叠加对二阶相干度和光场压缩特性的影响。数值计算的结果表明,随着光场系数的增大,反聚束效应持续时间逐渐增大,初始时刻原子能级的叠加导致光场聚束效应持续时间增大。无论初始时刻原子能级是否叠加,随着光场系数的增大,光场压缩效应持续时间均先增大后减小。由于非旋波项产生的虚光子效应,二阶相干度和光场压缩效应演化曲线出现小锯齿状振荡。
Abstract
The quantum properties of a binomial state field interacting with a Λ-type three-level atom are calculated accurately under non-rotating wave approximation. The influences of the binomial state field parameter and the superposition of atomic energy level at the initial time on the second-order coherence degree and the field squeezing effect are discussed. The numerical results indicate that the duration of the anti-bunching effect and the duration of the bunching effect due to the superposition of atomic energy level at the initial time becomes longer, with the increase of binomial state field parameter. Increasing the field parameter, the duration of the squeezing effect increases at first and then decreases whether the atomic energy level has a superposition or not. The little indentation oscillation appears in the evolution curves of the second-order coherence degree and the field squeezing effect, because of the virtual photon effect induced by non-rotating wave approximation.
丛红璐, 任学藻. 精确求解与Λ型原子作用二项式光场的量子特性[J]. 光学学报, 2017, 37(2): 0227001. Cong Honglu, Ren Xuezao. Exact Solution for Quantum Properties of the Binomial States Field Interacting with the Λ-Type Atom[J]. Acta Optica Sinica, 2017, 37(2): 0227001.