Nonclassical properties of coherent state orthogonalization via Hermite polynomial excited operation

Nonclassical properties of coherent state orthogonalization via Hermite polynomial excited operation
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通过 Hermite 多项式激发运算的相干态正交化的非经典性质

DOI:
10.1088/1612-202x/ab0c86
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发表时间:
2019-04
影响因子:
1.7
通讯作者:
Xu Ye Jun
Xu Ye Jun
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Yuan Hong Chun;Xu Xue Xiang;Cai Jian Wen;Xu Ye Jun

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本文从理论上构造了一种基于厄米多项式激发操作的正交相干态,其中Hm(x)是m阶厄米多项式,Hm(x)是一个创建算子,称之为厄米激发正交相干态(HEOCS)。然后,通过与厄米多项式激发相干态(HPECS)的比较,研究了它们不同的非经典性质,包括光子数分布、亚泊松统计、反聚束效应、正交压缩效应和负Wigner函数等。结果表明,通过改进和调制厄米多项式的阶数和相干振幅,HEOCS和HPECS都是具有高度非经典特性的非高斯量子态,这表明对给定的高斯态进行厄米激发操作是产生非高斯态的有效途径.
In this work, we theoretically construct an orthogonal state of a coherent state where the orthogonalizer is based on the Hermite polynomial excited operation with Hm(x) being a Hermite polynomial of order m and creation operator , called the Hermite-excite-orthogonalized coherent state (HEOCS). Then, in comparison with the Hermite polynomial excited coherent state (HPECS), we numerically investigate their different nonclassical properties by examining several measurable features, such as photon number distribution, sub-Poisson statistics, the antibunching effect, the quadrature squeezing effect, and the negative Wigner function. The results demonstrate that both HEOCS and HPECS are non-Gaussian quantum states with highly nonclassical characteristics by improving and modulating the order of the Hermite polynomial and coherent amplitude, which indicates that performing the Hermite-excited operation on given Gaussian states is an effective approach to generating non-Gaussian states.
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