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Open Quantum Systems Decoherence

Theory of Fano effect in cavity quantum electrodynamics

arXiv

Authors: Makoto Yamaguchi, Alexey Lyasota, Tatsuro Yuge

Year

2020

Paper ID

19353

Status

Preprint

Abstract Read

~2 min

Abstract Words

111

Citations

N/A

Abstract

We propose a Markovian 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.

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We propose a Markovian quantum master equation that can describe the Fano effect directly, by assuming a standard cavity quantum electrodynamics system.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2011.06245 [2] arXiv https://arxiv.org/abs/2011.06245 [3] Publisher https://arxiv.org/abs/2011.06245

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