Theory of Fano effect in cavity quantum electrodynamics
Theory of Fano effect in cavity quantum electrodynamics
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DOI：
10.1103/physrevresearch.3.013037
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发表时间：
2020-11
期刊：
影响因子：
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通讯作者：
M. Yamaguchi;A. Lyasota;T. Yuge
中科院分区：
文献类型：
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作者：
M. Yamaguchi;A. Lyasota;T. Yuge
通过假设一个标准的空腔量子电动力学系统，我们提出了一个可以直接描述Fano效应的Makorvian量子主方程。该框架允许我们推广Fano公式，适用于具有纯减相的弱耦合和强耦合状态。还以一致的方式给出了其发射光谱的公式。然后我们发现，导致法诺效应的干扰对纯减相是稳健的。这是违反直觉的，因为干涉的影响，在一般情况下，严重减少了退相干过程。因此，我们的方法为法诺效应的理论处理和对开放量子系统中量子干涉的新见解提供了基础。
We propose a Makorvian quantum master equation that can describe the Fano effect directly, by assuming a standard cavity quantum electrodynamics system. The framework allows us to generalize the Fano formula, applicable over the weak and strong coupling regimes with pure dephasing. A formulation of its emission spectrum is also given in a consistent manner. We then find that the interference responsible for the Fano effect is robust against pure dephasing. This is counterintuitive because the impact of interference is, in general, severely reduced by decoherence processes. Our approach thus provides a basis for theoretical treatments of the Fano effect and new insights into the quantum interference in open quantum systems.