|国家预印本平台
首页|Super-resolving frequency measurement with mode-selective quantum memory

Super-resolving frequency measurement with mode-selective quantum memory

Super-resolving frequency measurement with mode-selective quantum memory

来源:Arxiv_logoArxiv
英文摘要

High-precision optical frequency measurement is indispensable to modern science and technology, yet conventional spectroscopic techniques struggle to resolve spectral features narrower than their bandwidth. Here, we introduce a unique platform for super-resolving frequency estimation utilizing a mode-selective atomic Raman quantum memory implemented in warm cesium vapor. By precisely engineering the light-matter interaction, our memory coherently stores the optimal temporal mode with high fidelity and retrieves it on-demand, realizing a mode crosstalk as low as 0.34%. For the task of estimating the separation between two spectral lines, we experimentally measure the mean squared error of the frequency estimate, achieving a sensitivity as small as 1/20 of the linewidth with up to a ($34\pm4$)-fold enhancement in precision over direct intensity measurements. This enhanced resolution of frequency measurements, combined with the memory's capability of on-demand storage, retrieval and mode conversion, paves the way for multifunctional memory-based time-frequency sensors and their integration within quantum networks.

Shicheng Zhang、Aonan Zhang、Ilse Maillette de Buy Wenniger、Paul M. Burdekin、Steven Sagona-Stophel、Anindya Rastogi、Sarah E. Thomas、Ian A. Walmsley

物理学光电子技术

Shicheng Zhang,Aonan Zhang,Ilse Maillette de Buy Wenniger,Paul M. Burdekin,Steven Sagona-Stophel,Anindya Rastogi,Sarah E. Thomas,Ian A. Walmsley.Super-resolving frequency measurement with mode-selective quantum memory[EB/OL].(2025-06-25)[2025-07-16].https://arxiv.org/abs/2506.20514.点此复制

评论