Temperature-Controlled Resonance in a Heteronuclear Quantum Gas Mixture

• URL: http://arxiv.org/abs/2605.17931v1
• Date: Mon, 18 May 2026 06:39:04 GMT
• Title: Temperature-Controlled Resonance in a Heteronuclear Quantum Gas Mixture
• Abstract summary: Single-channel resonances are fundamental processes in scattering of atoms.<n>We propose a mechanism to realize a continuously tunable single-channel resonance by controlling the temperature of the heteronuclear mixture.<n>Our results establish temperature as a simple and experimentally accessible control knob for single-channel resonances in ultracold quantum gases.
• Score: 4.9644021776374325
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Single-channel resonances are fundamental processes in scattering of atoms, yet their occurrence is largely incidental and lacks systematic control. In this Letter, we propose a mechanism to realize a continuously tunable single-channel resonance by controlling the temperature of the heteronuclear mixture. By extending the Casimir-like mediated interaction to finite temperature, we demonstrate that thermal smearing of the Fermi surface reshapes the effective potential between impurities, giving rise to a temperature-controlled resonance (TCR) over a wide parameter range. As a direct consequence, the resonance position shifts systematically with temperature variation, providing a clear experimental signature of this mechanism. We further investigate the quench dynamics of a Bose gas immersed in a Fermi sea and demonstrate that the observed temperature-dependent loss features in recent experiments are consistent with the TCR mechanism. Our results establish temperature as a simple and experimentally accessible control knob for single-channel resonances in ultracold quantum gases.

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