arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.13863physics.opticsphysics.app-phquant-ph
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量子嵌入超态

Quantum Embedded Superstates

Nikita Nefedkin, Andrea Alú, Alex Krasnok

摘要:

光学超腔模式(超态),即,从开放腔的两个非正交模式的强耦合中出现的混合模式可以支持与连续体中的准束缚态(准BIC)相关联的散射光谱中的超箭头线。这些模式对于传感应用非常重要,因为它们使紧凑的系统具有前所未有的灵敏度。然而,这些准BIC传感器服从散粒噪声限制,这可能只在量子传感器中被克服。在这里,我们揭示了一个三能级量子系统(例如,原子、量子点、超导量子位)可以被定制以支持在强耦合机制中具有无限窄发射线的嵌入超态的量子模拟。值得注意的是,我们证明了这种系统与腔的耦合(例如,等离子体或电介质纳米颗粒、微腔、微波谐振器)使得能够实现具有显著降低的噪声的感测特性。我们的研究结果可以应用于从微波超导体到冷原子和量子点的大量量子平台,为量子传感和计算提供了有趣的机会。

英文摘要:

Optical supercavity modes (superstates), i.e., hybrid modes emerging from the strong coupling of two nonorthogonal modes of an open cavity, can support ultranarrow lines in scattering spectra associated with quasi bound states in the continuum (quasi-BIC). These modes are of great interest for sensing applications as they enable compact systems with unprecedented sensitivity. However, these quasi-BIC sensors obey the shot-noise limit, which may be overcome only in quantum sensors. Here, we unveil that a three-level quantum system (e.g., atom, quantum dot, superconducting qubit) can be tailored to support the quantum analog of an embedded superstate with an unboundedly narrow emission line in the strong coupling regime. Remarkably, we demonstrate that the coupling of such a system with a cavity (e.g., plasmonic or dielectric nanoparticle, microcavity, microwave resonator) enables sensing properties with significantly reduced noise. Our results can be applied to a plethora of quantum platforms from microwave superconductors to cold atoms and quantum dots, opening interesting opportunities for quantum sensing and computing.

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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