当前位置: X-MOL 学术Optica › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
On-demand indistinguishable single photons from an efficient and pure source based on a Rydberg ensemble
Optica ( IF 10.4 ) Pub Date : 2020-07-15 , DOI: 10.1364/optica.391485
D. P. Ornelas-Huerta , A. N. Craddock , E. A. Goldschmidt , A. J. Hachtel , Y. Wang , P. Bienias , A. V. Gorshkov , S. L. Rolston , J. V. Porto

Single photons coupled to atomic systems have shown to be a promising platform for developing quantum technologies. Yet a bright on-demand, highly pure, and highly indistinguishable single-photon source compatible with atomic platforms is lacking. In this work, we demonstrate such a source based on a strongly interacting Rydberg system. The large optical nonlinearities in a blockaded Rydberg ensemble convert coherent light into a single collective excitation that can be coherently retrieved as a quantum field. We simultaneously observe a fully single-mode (spectral, temporal, spatial, and polarization) efficiency up to 0.098(2), a detector-background-subtracted ${g^{(2)}} = 5.0(1.6) \times {10^{- 4}}$, and indistinguishability of 0.980(7), at an average photon production rate of $1.18(2) \times {10^4} \;{{\rm s}^{- 1}}$. All of these make this system promising for scalable quantum information applications. Furthermore, we investigate the effects of contaminant Rydberg excitations on the source efficiency and observed single-mode efficiencies up to 0.18(2) for lower photon rates. Finally, recognizing that many quantum information protocols require a single photon in a fully single mode, we introduce metrics that take into account all degrees of freedom to benchmark the performance of on-demand sources.

中文翻译:

基于Rydberg集合的高效纯净光源的按需不可区分单光子

耦合到原子系统的单光子已被证明是开发量子技术的有前途的平台。然而,缺少与原子平台兼容的明亮的按需,高度纯净且高度难以区分的单光子源。在这项工作中,我们演示了基于强相互作用的Rydberg系统的这种来源。受阻的Rydberg集成体中的较大光学非线性将相干光转换为可以作为量子场相干检索的单个集体激发。我们同时观察到高达0.098(2)的完全单模(光谱,时间,空间和极化)效率,减去检测器背景的$ {g ^ {(2)}} = 5.0(1.6)\ times { 10 ^ {-4}} $和0.980(7)的不可分辨性,平均光子生产率为$ 1.18(2)\ times {10 ^ 4} \; {{\ rm s} ^ {-1}} $。所有这些使该系统有望用于可扩展的量子信息应用。此外,我们研究了污染的里德堡激发对光源效率的影响,并观察到在较低的光子速率下,单模效率高达0.18(2)。最后,认识到许多量子信息协议在完全单一的模式下需要一个光子,因此,我们引入了考虑所有自由度的度量标准来对按需信号源的性能进行基准测试。
更新日期:2020-07-21
down
wechat
bug