超冷气体中费什巴赫共振的Floquet工程

IF 12.5 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Advances Pub Date : 2025-10-03 DOI:10.1126/sciadv.adw3856

Alexander Guthmann, Felix Lang, Louisa Marie Kienesberger, Sian Barbosa, Artur Widera

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引用次数: 0

摘要

散射共振是物理学许多领域的基础，发生在广泛的能量尺度范围内。在超冷量子气体中，磁性费什巴赫共振通过实现原子之间精确的相互作用控制，改变了量子多体研究。在这里，我们展示了前所未有的控制，通过在锂-6 （^{6}Li）原子气体中通过每秒兆周频率的强磁场调制，在可调谐位置通过Floquet驱动来设计费什巴赫共振。每当修饰的分子能级越过原子阈值时，这种周期性调制就会产生散射共振。通过在两倍基频下添加第二个调制，我们调整了共振损耗曲线的不对称性，并抑制了Floquet加热引起的两体损耗。这项技术增强了对原子相互作用的控制，扩大了复杂系统的量子模拟和奇异量子相研究的可能性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Floquet engineering of Feshbach resonances in ultracold gases

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Floquet engineering of Feshbach resonances in ultracold gases

Scattering resonances are fundamental to many areas of physics, occurring across a wide range of energy scales. In ultracold quantum gases, magnetic Feshbach resonances have transformed quantum many-body research by enabling precise interaction control between atoms. Here, we demonstrate unprecedented control to engineer Feshbach resonances at tunable positions via Floquet driving in a lithium-6 (^{6}Li) atom gas, achieved through strong magnetic field modulation at megacycles per second frequencies. This periodic modulation creates scattering resonances whenever dressed molecular levels cross the atomic threshold. By adding a second modulation at twice the base frequency, we tune the asymmetry of resonance loss profiles and suppress two-body losses from Floquet heating. This technique enhances control over atomic interactions, expanding possibilities for quantum simulations of complex systems and studies of exotic quantum phases.

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来源期刊

Science Advances 综合性期刊-综合性期刊

CiteScore

21.40

自引率

1.50%

发文量

1937

审稿时长

29 weeks

期刊介绍： Science Advances, an open-access journal by AAAS, publishes impactful research in diverse scientific areas. It aims for fair, fast, and expert peer review, providing freely accessible research to readers. Led by distinguished scientists, the journal supports AAAS's mission by extending Science magazine's capacity to identify and promote significant advances. Evolving digital publishing technologies play a crucial role in advancing AAAS's global mission for science communication and benefitting humankind.