Collectively induced exceptional points of quantum emitters coupled to nanoparticle surface plasmons

Po Chen Kuo, Neill Lambert, Adam Miranowicz, Hong Bin Chen, Guang Yin Chen, Yueh Nan Chen, Franco Nori

研究成果: Article

1 引文 斯高帕斯(Scopus)

摘要

Exceptional points, resulting from non-Hermitian degeneracies, have the potential to enhance the capabilities of quantum sensing. Thus, finding exceptional points in different quantum systems is vital for developing such future sensing devices. Taking advantage of the enhanced light-matter interactions in a confined volume on a metal nanoparticle surface, here we theoretically demonstrate the existence of exceptional points in a system consisting of quantum emitters coupled to a metal nanoparticle of subwavelength scale. By using an analytical quantum electrodynamics approach, exceptional points are manifested as a result of a strong-coupling effect and observable in a drastic splitting of originally coalescent eigenenergies. Furthermore, we show that exceptional points can also occur when a number of quantum emitters are collectively coupled to the dipole mode of localized surface plasmons. Such a quantum collective effect not only relaxes the strong-coupling requirement for an individual emitter, but also results in a more stable generation of the exceptional points. Furthermore, we point out that the exceptional points can be explicitly revealed in the power spectra. A generalized signal-to-noise ratio, accounting for both the frequency splitting in the power spectrum and the system's dissipation, shows clearly that a collection of quantum emitters coupled to a nanoparticle provides a better performance of detecting exceptional points, compared to that of a single quantum emitter.

原文English
文章編號013814
期刊Physical Review A
101
發行號1
DOIs
出版狀態Published - 2020 一月 14

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

指紋 深入研究「Collectively induced exceptional points of quantum emitters coupled to nanoparticle surface plasmons」主題。共同形成了獨特的指紋。

  • 引用此