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arXiv 1801.03037quant-phphysics.optics
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多能级量子发射体系统的光子散射。II。应用于一维波导耦合发射器

Photon Scattering from a System of Multi-Level Quantum Emitters. II. Application to Emitters Coupled to a 1D Waveguide

Sumanta Das, Vincent E. Elfving, Florentin Reiter, Anders S. Sørensen

摘要:

在前面的文章中,我们介绍了一种形式来研究低强度场的散射从一个系统的多层次发射器嵌入在一个$3$ D介质。在这里,我们展示了如何使用这种光子散射关系来分析从耦合到$1$ D波导的任何通用多能级量子发射器的单光子和弱相干态的散射。减少光子散射关系到$1$ D波导提供了第一次直接解决散射问题,涉及低强度场在波导QED制度。为了展示我们的形式主义是如何工作的,我们考虑多级发射器的例子,并评估传输和反射场的振幅。此外,我们扩展我们的研究,包括一个弱相干光子脉冲的散射的发射器的动力学响应。由于我们的光子散射关系是基于海森堡图片,这是非常有用的问题,涉及光检测的波导结构。我们表明这一点,通过考虑一个特定的问题,在一个多层次的发射器,我们的形式主义展示其全部潜力的光检测状态生成。由于所考虑的发射体是通用的,因此$1$ D结果适用于耦合到$1$ D波导或传输线的原子、离子、量子点、超导量子位和氮空位中心等过多的物理系统。

英文摘要:

In a preceding paper we introduced a formalism to study the scattering of low intensity fields from a system of multi-level emitters embedded in a $3$D dielectric medium. Here we show how this photon-scattering relation can be used to analyze the scattering of single photons and weak coherent states from any generic multi-level quantum emitter coupled to a $1$D waveguide. The reduction of the photon-scattering relation to $1$D waveguides provides for the first time a direct solution of the scattering problem involving low intensity fields in the waveguide QED regime. To show how our formalism works, we consider examples of multi-level emitters and evaluate the transmitted and reflected field amplitude. Furthermore, we extend our study to include the dynamical response of the emitters for scattering of a weak coherent photon pulse. As our photon-scattering relation is based on the Heisenberg picture, it is quite useful for problems involving photo-detection in the waveguide architecture. We show this by considering a specific problem of state generation by photo-detection in a multi-level emitter, where our formalism exhibits its full potential. Since the considered emitters are generic, the $1$D results apply to a plethora of physical systems like atoms, ions, quantum dots, superconducting qubits, and nitrogen-vacancy centers coupled to a $1$D waveguide or transmission line.

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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