Investigations of All-Optical Bose Condensates

这个项目的科学目标是研究原子玻色-爱因斯坦凝聚(BEC)的全光学方法。该小组最近演示的全光学BEC提供了自1995年开创性演示以来实现原子气体量子简并的第一条新途径。这种方法非常简单，而且比标准的BEC实验快了一个数量级。在本项目正在进行的新调查中，工作重点将集中在检查这些圈闭非凡的负载特性背后的机制。此外，通过调整光学俘获势能提供的相当大的灵活性将被用来探索替代的俘获几何结构，允许在大周期晶格中形成多个凝聚体。这种能力，再加上这些陷阱的自旋无关性质，将使探索多组分(旋量)凝聚的许多基本问题成为可能。在更广泛的范围内，玻色-爱因斯坦凝聚在稀薄原子气体中的成就创造了AMO物理研究的新前沿，与传统凝聚态物理领域有显著重叠。考虑到该领域的潜力，探索达到BEC的不同方法是很重要的，特别是提供新功能、简单性或速度的方法。研究工作将伴随着对学生在这一新兴领域工作的培训。

The scientific objective of this project is to investigate all-optical approaches to atomic Bose-Einstein condensation (BEC). The recent demonstration of all-optical BEC by this group provided the first new path to achieving quantum degeneracy in atomic gases since the pioneering demonstrations in 1995. The method is surprising simple and an order of magnitude faster than standard BEC experiments. In the new investigations being undertaken in the present project, efforts will concentrate on examining the mechanisms behind the remarkable loading properties of these traps. Additionally, the considerable flexibility provided by tailoring the optical trapping potential will be exploited to explore alternative trapping geometries, allowing for formation of multiple condensates in large-period lattices. This capability, combined with spin-independent nature of these traps, will make it possible to explore many fundamental issues of multi-component (spinor) condensates. In a broader scope, the achievement of Bose-Einstein condensation in dilute atomic gases has created a new frontier of research in AMO physics with significant overlap with traditional areas of condensed matter physics. Given the potential of the field, it is important to explore different methods for reaching BEC, particularly methods that offer new capabilities, simplicity, or speed. Research efforts will be accompanied by the training of students to work in this emerging new field.