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arXiv 2103.13100quant-ph
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量子点光子发射的量子回归定理的准确性

Accuracy of the quantum regression theorem for photon emission from a quantum dot

M. Cosacchi, T. Seidelmann, M. Cygorek, A. Vagov, D. E. Reiter, V. M. Axt

摘要:

量子回归定理(QRT)是计算多时间关联函数以评估量子发射体的最广泛使用的工具。它是一种基于马尔可夫假设的环境耦合近似方法。在这项工作中,我们量化的光子从一个单一的量子点耦合到声子发射的属性。对于单光子纯度和不可分辨性,我们比较了数值精确的路径积分结果与从QRT得到的结果。结果表明,QRT系统地高估了环境对量子信息技术中典型量子点的影响。

英文摘要:

The quantum regression theorem (QRT) is the most-widely used tool for calculating multitime correlation functions for the assessment of quantum emitters. It is an approximate method based on a Markov assumption for the environmental coupling. In this work we quantify properties of photons emitted from a single quantum dot coupled to phonons. For the single-photon purity and the indistinguishability, we compare numerically exact path-integral results with those obtained from the QRT. It is demonstrated that the QRT systematically overestimates the influence of the environment for typical quantum dots used in quantum information technology.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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