Fundamental Limits of Feedback Cooling Ultracold Atomic Gases
Abstract
We investigate the fundamental viability of cooling ultracold atomic gases with quantum feedback control. Our study shows that the trade-off between the resolution and destructiveness of optical imaging techniques imposes constraints on the efficacy of feedback cooling, and that rapid rethermalization is necessary for cooling thermal gases. We construct a simple model to determine the limits to feedback cooling set by the visibility of density fluctuations, measurement-induced heating, and three-body atomic recombination. We demonstrate that feedback control can rapidly cool high-temperature thermal clouds in quasi-2D geometries to degenerate temperatures with minimal atom loss compared to traditional evaporation. Our analysis confirms the feasibility of feedback cooling ultracold atomic gases, providing a pathway to new regimes of cooling not achievable with current approaches.
Keywords
Cite
@article{arxiv.2306.09846,
title = {Fundamental Limits of Feedback Cooling Ultracold Atomic Gases},
author = {Zain Mehdi and Simon A. Haine and Joseph J. Hope and Stuart S. Szigeti},
journal= {arXiv preprint arXiv:2306.09846},
year = {2024}
}