arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2302.04059quant-phcond-mat.quant-gasphysics.optics
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共振荧光中的纠缠

Entanglement in Resonance Fluorescence

Juan Camilo López Carreño, Santiago Bermúdez Feijoo, Magdalena Stobińska

AI总结:

提出基于共振荧光的新型纠缠光子源,利用强失谐激光驱动二能级系统卫星峰发射真空与Bell态叠加的光子对,可按需优化纠缠度,并成功使极化激元系统达到最大纠缠稳态。

摘要:

粒子纠缠是许多量子技术所依赖的基础资源。然而,迄今为止最好的纠缠光子源依赖于参量下转换过程,该过程仅在特定频率下才是最优的,而这些频率很少与能从纠缠中受益的凝聚态系统的能量相匹配。在本文中,我们展示了一种规避该问题的方法,并引入了一种基于共振荧光的新型纠缠光子源,它输出的光子对是真空态与Bell态$|Φ^-\ angle$的叠加态。我们的方案依赖于由强失谐激光驱动的二能级系统卫星峰的发射,激光的强度控制着纠缠光子的频率。此外,对于每一对频率,纠缠度都可以得到优化,从而展现出相对于现有技术的明显优势。最后,我们通过激发极化激元系统并证明其处于最大纠缠稳态,展示了我们这种新型纠缠单光子对光源的强大能力。

英文摘要:

Particle entanglement is a fundamental resource upon which are based many quantum technologies. However, the up-to-now best sources of entangled photons rely on parametric down-conversion processes, which are optimal only at certain frequencies, which rarely match the energies of condensed-matter systems that can benefit from entanglement. In this Article, we show a way to circumvent this issue, and we introduce a new source of entangled photons based on resonance fluorescence delivering photon pairs as a superposition of vacuum and the Bell state $|Φ^-\rangle$. Our proposal relies on the emission from the satellite peaks of a two-level system driven by a strong off-resonant laser, whose intensity controls the frequencies of the entangled photons. Furthermore, the degree of entanglement can be optimized for every pair of frequencies, thus demonstrating a clear advantage over existing technologies. Finally, we illustrate the power of our novel source of entangled single-photon pairs by exciting a system of polaritons and showing that they are left in a maximally entangled steady state.

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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