Non-equilibrium dynamics of ultra cold lattice gases with inter-site interactions

具有位点间相互作用的超冷晶格气体的非平衡动力学

• 批准号: 395724503
• 负责人: Professor Dr. Luis Santos
• 金额: --
• 依托单位: Institut für Theoretische Physik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/395724503?language=en
• 关键词: Non; equilibrium; dynamics; ultra; cold

Recent experiments on dipolar and Rydberg-dressed gases in optical lattices open promising perspectives for the simulation of lattice models with inter-site interactions. The combination of energy conservation, finite band-width, and inter-site interactions is expected to lead to a wealth of new non-equilibrium phenomena absent in systems with only on-site interactions. Even moderate inter-site interactions are expected to lead to the formation of clusters of many particles, which may hinder or totally preclude the motion in the lattice. We will study this motion in detail, and evaluate its consequences for on-going experiments. Moreover, the dynamics of holons, i.e. empty sites, doped within an insulator may become strikingly different to that of individual particles. We will analyze this dynamics, including holon-induced particle ejection, dynamically-maintained bulk- and edge-holons, and interaction-induced lattice reconfiguration. We will as well investigate the adiabatic realization of the Haldane-insulator phase, a phase with a non-local string-order that constitutes one the most relevant novel features in extended Bose-Hubbard models. Our results are expected to impact on on-going experiments, which whom we will maintain a close collaboration.

最近对光学晶格中偶极和里德堡修饰气体的实验为具有点间相互作用的晶格模型的模拟开辟了有希望的前景。能量守恒、有限带宽和位点间相互作用的结合预计将导致大量新的非平衡现象，而这些现象在只有位点相互作用的系统中是不存在的。即使是适度的位点间相互作用也会导致许多粒子簇的形成，这可能会阻碍或完全阻止晶格中的运动。我们将详细研究这一运动，并评估其对正在进行的实验的影响。此外，在绝缘体中掺杂的空穴的动力学可能与单个粒子的动力学截然不同。我们将分析这种动力学，包括量子诱导的粒子抛射，动态维持的体和边量子，以及相互作用诱导的晶格重构。我们还将研究Haldane-insulator相的绝热实现，这是一个具有非局部弦序的相，构成了扩展Bose-Hubbard模型中最相关的新特征之一。我们的研究结果预计将对正在进行的实验产生影响，我们将与这些实验保持密切合作。