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Optical and Quantum Sensing and Precision Metrology II

Nonlocal phase modulation of multi-frequency-mode twin beams: toward networked quantum computing and sensing

Zhifan Zhou, Luı́s E. E. de Araujo, M. T. DiMario, Brielle E. Anderson, Jie Zhao, K. M. Jones, Paul D. Lett

Published Mar 8, 2023• 0 citations
Publisher

Abstract

We experimentally investigate the nonlocal phase modulation of multi-frequency-mode twin beams via a fourwave mixing process. Two separated phase modulators interfere nonlocally to modify the beam correlations, resulting in various covariance matrices.
DOI
10.1117/12.2657298

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Using a nondegenerate four-wave mixing process based on a double-$\mathrm{\ensuremath{\Lambda}}$ scheme in hot cesium vapor, we generate quantum correlated twin beams with a maximum intensity-difference squeezing of 6.5 dB. The substantially improved squeezing can be mainly attributed to very good frequency and phase-difference stability between the pump and probe beams in our experiment. Intensity-difference squeezing can be observed within a wide experimental parameter range, which guarantees its robust generation. Since this scheme produces multi-spatial-mode twin beams at the Cs D1{D}_{1}D1​ line, it is of interest for experiments involving quantum imaging and coherent interfaces between atomic and solid-state systems.