Electromagnetically Induced Transparency and Optical Pumping in the Hyperfine Paschen-Back Regime

• URL: http://arxiv.org/abs/2307.08545v2
• Date: Tue, 19 Dec 2023 14:41:34 GMT
• Title: Electromagnetically Induced Transparency and Optical Pumping in the Hyperfine Paschen-Back Regime
• Authors: Roberto Mottola, Gianni Buser, Philipp Treutlein
• Abstract summary: We report experiments of rubidium vapor in a high magnetic field under conditions of electromagnetically induced transparency (EIT) and optical pumping. The 1.1 T static magnetic field decouples nuclear and electronic spins and shifts each magnetic state via the Zeeman effect. We conclude that the cleanliness'' of this system greatly enhances the capabilities of quantum control in hot vapor.
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• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We report spectroscopy experiments of rubidium vapor in a high magnetic field under conditions of electromagnetically induced transparency (EIT) and optical pumping. The 1.1 T static magnetic field decouples nuclear and electronic spins and shifts each magnetic state via the Zeeman effect, allowing us to resolve individual optical transitions of the D$_2$ line in a Doppler-broadened medium. By varying the control laser power driving one leg of a spectrally isolated $\Lambda$ system we tune the vapor from the EIT regime to conditions of Autler-Townes line splitting. The resulting spectra conform to simple three-level models demonstrating the effective simplification of the energetic structure. Further, we quantify the viability of state preparation via optical pumping on nuclear spin-forbidden transitions. We conclude that the ``cleanliness'' of this system greatly enhances the capabilities of quantum control in hot vapor, offering advantages in a broad variety of quantum applications plagued by spurious light-matter interaction processes, such as atomic quantum memories for light.

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