AI 中文总结
研究吸引型三色费米-哈伯德模型，通过行列式量子蒙特卡罗模拟发现量子简并温度下会出现电荷密度波与色超流序共存的晶格费米超固体态，该体系可用于探索超冷晶格费米子的超固体性。
AI 中文摘要
近期在正方光晶格上半满填充的三色费米-哈伯德模型的实验实现，为探索超越常规SU(2)体系的奇异物质态提供了新平台。本文中，我们采用行列式量子蒙特卡罗模拟，研究具有色依赖吸引相互作用的三色费米-哈伯德模型。研究发现，在量子简并温度下，中等至强耦合的两色子系统与弱耦合的第三色环境相互作用，会形成晶格费米超固体态；该态以电荷密度波与色超流序共存为特征，有望用现有技术进行实验探测。我们的结果表明，正方光晶格上的吸引型三色费米-哈伯德模型是可通过实验实现的体系，可用于探索超冷晶格费米子的超固体性，仅需简单的晶格几何结构和易调控的 onsite 相互作用。
英文摘要
The recent experimental realization of the half-filled three-color Fermi-Hubbard model on a square optical lattice provides a novel platform for exploring exotic states of matter beyond conventional SU(2) systems. In this Letter, we investigate the three-color Fermi-Hubbard model with color-dependent attractive interactions using determinant quantum Monte Carlo simulations. We find that, at quantum degenerate temperatures, a lattice Fermi supersolid state emerges from the interplay between a moderately-to-strongly interacting two-color subsystem and a weakly coupled third-color environment. This supersolid state, characterized by the coexistence of charge-density-wave and color-superfluid orders, is highly promising for experimental detection with current techniques. Our results demonstrate that the attractive three-color Fermi-Hubbard model on a square optical lattice offers an experimentally accessible system for exploring the supersolidity of ultracold lattice fermions, requiring only a simple lattice geometry and easily tunable onsite interactions.
Comments10 pages, 11 figures
