项目名称: 人工规范场下光晶格中超冷原子气体的输运特性研究
项目编号: No.11305132
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 数理科学和化学
项目作者: 张爱霞
作者单位: 西北师范大学
项目金额: 22万元
中文摘要: 在绝对零温下,针对人工规范场作用下光晶格中的超冷原子气体,结合量子多体理论和平均场理论,利用解析分析和数值模拟,深入研究人工规范场与光晶格、原子间相互作用以及无序的关联特性及由此引起的能带特性、不稳定性、隧穿特性和相变特性,探讨虚拟规范场对光晶格中物质波相干性和输运特性的影响,为在光晶格中对物质波进行相干操控并实现可控输运提供依据,并有望揭示人工规范场作用下冷原子气体在光晶格中的一些新量子现象。在理论上发展分析人工规范场作用下光晶格中原子气体动力学特性的理论方法,揭示规范场与光晶格、原子相互作用以及无序耦合引起的相干-退相干机理,并获得系统发生各类相变的解析规律和临界条件。 人工规范场作用下光晶格中原子气体相变特性和相干特性的研究,不但对揭示强关联多体量子系统中若干复杂物理问题具有重要科学意义,而且在量子模拟、量子计算、量子调控等领域具有重要应用前景。
中文关键词: 超冷原子;光晶格;人工规范场;;
英文摘要: At T=0, within the many body quantum theory and mean field theory, the energy spectrum, the instabilities, the coherence and the transportation properties of ultracold atoms induced by the interplay between the artificial gauge fields and the optical lattice, the atomic interactions and the disordered will be discussed. Our studies will give a clear proof of the interplay between the artificial gauge fields and the atomic interactions and the disorder optical lattices, provide a possible way for coherently controlling the matter waves, show some new quantum phenomena, and improve the theoretical methods for analyzing the quantum gases in optical lattices with artificial gauge fields. In addition to its potential application in quantum simulation, quantum computing and manipulation, the study of the superfluidity, the quantum phase transitions and the coherence of cold atoms in optical lattices with artificial gauge fields also provides an important route for answering some unresolved questions in theory of strongly correlated systems.
英文关键词: ultracold atom;optical lattice;artificial gauge fields;;