{"title":"Tunable single emitter-cavity coupling strength through waveguide-assisted energy quantum transfer.","authors":"Yuan Liu, Hongwei Zhou, Linhan Lin, Hong-Bo Sun","doi":"10.1038/s41377-024-01508-z","DOIUrl":null,"url":null,"abstract":"<p><p>The emitter-cavity strong coupling manifests crucial significance for exploiting quantum technology, especially in the scale of individual emitters. However, due to the small light-matter interaction cross-section, the single emitter-cavity strong coupling has been limited by its harsh requirement on the quality factor of the cavity and the local density of optical states. Herein, we present a strategy termed waveguide-assisted energy quantum transfer (WEQT) to improve the single emitter-cavity coupling strength by extending the interaction cross-section. Multiple ancillary emitters are optically linked by a waveguide, providing an indirect coupling channel to transfer the energy quantum between target emitter and cavity. An enhancement factor of coupling strength <math> <mrow> <mover><mrow><mi>g</mi></mrow> <mo>̃</mo></mover> <mo>/</mo> <mi>g</mi> <mo>></mo> <mn>10</mn></mrow> </math> can be easily achieved, which dramatically release the rigorous design of cavity. As an extension of concept, we further show that the ancillae can be used as controlling bits for a photon gate, opening up new degrees of freedom in quantum manipulation.</p>","PeriodicalId":18093,"journal":{"name":"Light, science & applications","volume":null,"pages":null},"PeriodicalIF":19.4000,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11258325/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Light, science & applications","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1038/s41377-024-01508-z","RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Physics and Astronomy","Score":null,"Total":0}
引用次数: 0
Abstract
The emitter-cavity strong coupling manifests crucial significance for exploiting quantum technology, especially in the scale of individual emitters. However, due to the small light-matter interaction cross-section, the single emitter-cavity strong coupling has been limited by its harsh requirement on the quality factor of the cavity and the local density of optical states. Herein, we present a strategy termed waveguide-assisted energy quantum transfer (WEQT) to improve the single emitter-cavity coupling strength by extending the interaction cross-section. Multiple ancillary emitters are optically linked by a waveguide, providing an indirect coupling channel to transfer the energy quantum between target emitter and cavity. An enhancement factor of coupling strength can be easily achieved, which dramatically release the rigorous design of cavity. As an extension of concept, we further show that the ancillae can be used as controlling bits for a photon gate, opening up new degrees of freedom in quantum manipulation.
发射器-腔体强耦合对于利用量子技术,特别是单个发射器尺度的量子技术具有至关重要的意义。然而,由于光-物质相互作用截面较小,单个发射器-腔体强耦合对腔体的品质因数和局部光态密度有苛刻的要求,因而受到限制。在这里,我们提出了一种称为波导辅助能量量子转移(WEQT)的策略,通过扩大相互作用截面来提高单发射极-腔体耦合强度。多个辅助发射器通过波导光学连接,为目标发射器和腔体之间的能量量子转移提供了间接耦合通道。耦合强度 g ̃ / g > 10 的增强因子很容易实现,这大大降低了腔体设计的严谨性。作为概念的延伸,我们进一步证明了辅助腔可用作光子门的控制位,为量子操纵开辟了新的自由度。
期刊介绍:
Light: Science & Applications is an open-access, fully peer-reviewed publication.It publishes high-quality optics and photonics research globally, covering fundamental research and important issues in engineering and applied sciences related to optics and photonics.