Measurement of the wavefunction for a biphoton state with homodyne detection using least squares estimation

Measurement of the wavefunction for a biphoton state with homodyne detection using least squares estimation
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使用最小二乘估计通过零差检测测量双光子状态的波函数

DOI:
10.1088/2040-8986/ab6422
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发表时间:
2020-01
期刊:
影响因子:
2.1
通讯作者:
Yun Zhang
Yun Zhang
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Yashuai Han;Daohua Wu;Katsuyuki Kasai;Lirong Wang;Masayoshi Watanabe;Yun Zhang

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本文报道了用纯差法测量具有连续变量(CV)的双光子态的波函数。双光子干涉发生在光学参量振荡器上,该振荡器以相干态播种。当强度相干态发生变化时,记录了输出场的一组二阶相关函数值。利用最小二乘估计方法重构了双光子态的波函数,其中包括双光子态的一个复杂参数的幅值和参数。这可能引入另一种方法来表征双光子状态在CV的制度。
We report the measurement of wave function for a biphoton state with continuous variables (CV) by homodyne detection. The biphoton interference occurs on an optical parametric oscillator, which is seeded with a coherent state. A set of second-order correlation function values for the output field are recorded when the intensity coherent state is varied. The wave function, which includes both magnitude and argument for a complex parameter of the biphoton state, is reconstructed using the least square estimation method. This may introduce another approach to characterizing a biphoton state in the regime of CV.
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