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arXiv 1511.03469quant-ph
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高精度光谱学的主方程

Master equation for high-precision spectroscopy

Andreas Alexander Buchheit, Giovanna Morigi

摘要:

高精度光谱学的进展要求人们验证理论模型的准确性,例如描述原子自发发射的主方程。为此,我们应用粗粒化方法导出了原子与电磁场模相互作用的主方程。这个主方程自然包括由于衰变通道中的量子干涉而产生的项,并且满足Lindblad定理的要求,而不需要唯象假设。然后,我们考虑原子氢的2S-4P线的光谱,并表明这些干扰项,通常被忽略,显着有助于光子计数信号。这些结果可以是重要的理解光谱测量在最近的实验测试量子电动力学的有效性。

英文摘要:

The progress in high-precision spectroscopy requires one to verify the accuracy of theoretical models such as the master equation describing spontaneous emission of atoms. For this purpose, we apply the coarse-graining method to derive a master equation of an atom interacting with the modes of the electromagnetic field. This master equation naturally includes terms due to quantum interference in the decay channels and fulfills the requirements of the Lindblad theorem without the need of phenomenological assumptions. We then consider the spectroscopy of the 2S-4P line of atomic Hydrogen and show that these interference terms, typically neglected, significantly contribute to the photon count signal. These results can be important in understanding spectroscopic measurements performed in recent experiments for testing the validity of quantum electrodynamics.

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