Overcoming correlation fluctuations in two-photon interference experiments with differently bright and independently blinking remote quantum emitters
Overcoming correlation fluctuations in two-photon interference experiments with differently bright and independently blinking remote quantum emitters
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DOI：
10.1103/physrevb.97.195414
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发表时间：
2018-03
影响因子：
3.7
通讯作者：
J. Weber;J. Kettler;H. Vural;M. Muller;J. Maisch;M. Jetter;S. Portalupi;P. Michler
中科院分区：
文献类型：
--
作者：
J. Weber;J. Kettler;H. Vural;M. Muller;J. Maisch;M. Jetter;S. Portalupi;P. Michler
作为量子计算和通信协议的基本构建模块，正确验证两个独立量子光源之间的双光子干涉（TPI）对比度至关重要。在这里，我们的实验证明如何频繁地闪烁的动态和发射器亮度的变化严重影响宏欧曼德尔型（HOM）相关直方图的远程TPI实验测量通过常用的设置配置。我们进一步利用这种定性和定量的解释所观察到的相关动力学，建立一个替代的干涉仪配置，这是克服所讨论的时间波动，从而产生一个无误差的远程TPI可见性的测定。通过蒙特-卡罗模拟再现测量的相关统计，我们证明了所获得的相关性的充分知识。作为示例性系统，我们使用两对远程半导体量子点，然而，相同的结论适用于具有来自任何种类的远程固态量子发射器的飞行量子位的TPI实验。
As a fundamental building block for quantum computation and communication protocols, the correct verification of the two-photon interference (TPI) contrast between two independent quantum light sources is of utmost importance. Here, we experimentally demonstrate how frequently present blinking dynamics and changes in emitter brightness critically affect the Hong-Ou-Mandel-type (HOM) correlation histograms of remote TPI experiments measured via the commonly utilized setup configuration. We further exploit this qualitative and quantitative explanation of the observed correlation dynamics to establish an alternative interferometer configuration, which is overcoming the discussed temporal fluctuations, giving rise to an error-free determination of the remote TPI visibility. We prove full knowledge of the obtained correlation by reproducing the measured correlation statistics via Monte-Carlo simulations. As exemplary system, we make use of two pairs of remote semiconductor quantum dots, however, the same conclusions apply for TPI experiments with flying qubits from any kind of remote solid state quantum emitters.