Fundamental Limits of Feedback Cooling Ultracold Atomic Gases

• URL: http://arxiv.org/abs/2306.09846v2
• Date: Thu, 13 Jun 2024 06:00:24 GMT
• Title: Fundamental Limits of Feedback Cooling Ultracold Atomic Gases
• Authors: Zain Mehdi, Simon A. Haine, Joseph J. Hope, Stuart S. Szigeti,
• Abstract summary: We investigate the 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.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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.

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