Title: Experiments with ultracold atoms in optical and magnetic potentials

该项目使用了一种现有的设备，通过激光冷却和Ru原子的磁性陷阱来产生温度为数十纳米开尔文的量子气体。超冷原子的量子简并气体使人们能够进行各种各样的实验来研究量子现象。*目的和目的将实施一种新的方案，将超冷原子限制在偶极势中，该偶极势可以由诸如声光偏转器等衍射光学元件动态控制和塑造。这一装置将使研究性质成为可能，例如在新的限制几何中的量子隧道和超流体流。实验将扩展到使用两种物种的混合物，即RB-87同位素的两种不同状态的原子或两种原子，从而提供一种物种的几个原子作为浸泡在量子气体中的“杂质”的条件。*研究方法的新颖性之前，牛津大学的实验工作是在磁性陷阱中使用单一原子物种进行的，但在不久的将来，将建立并测试双物种实验所需的额外激光。Kathrin将开发一种将偶极力捕获与现有的磁捕获相结合的系统。她还将研究一种光学系统来检测单个原子，从而允许我们处理高度不平衡的混合物，即量子气体中的几个杂质原子。这些杂质可以以新的方式探测这些量子系统的局域性质。*与EPSRC的战略和研究领域(她的项目涉及的EPSRC研究领域)保持一致，基础原子物理项目是基于超冷原子的量子传感器的许多研究工作的基础，特别是原子干涉计量学。

The project uses an existing apparatus for producing quantum gases at temperatures of tens of nanokelvin by laser cooling and magnetic trapping of rubidium atoms. Quantum degenerate gases of ultracold atoms enable a wide variety of experiments to be carried out to investigate quantum phenomena.* Aims and objectivesA new scheme will be implemented for confining ultracold atoms in a dipole potential that can be dynamically controlled and shaped by a diffractive optical element such as acousto-optical deflectors. This apparatus will enable the investigation of properties such as quantum tunnelling in new confinement geometries and superfluid flow. The experiments will be extended to use a mixture of two species, i.e. atoms in two different states of the Rb-87 isotope or two species of atoms, thus giving conditions where a few atoms of one species act as `impurities' immersed in a quantum gas.* Novelty of the research methodologyPreviously the experimental work in Oxford has been carried out with a single atomic species in a magnetic trap but in the near future the additional lasers required for dual-species experiments will be set up and tested. Kathrin will develop a system that combines dipole force trapping with the existing magnetic trapping. She will also work on a optical system to detect individual atoms and so allow us to work with highly imbalanced mixtures, i.e., a few impurity atoms within a quantum gas. These impurities can probe local properties of these quantum systems in new ways.* Alignment to EPSRC's strategies and research areas (which EPSRC research area her project relates to)The project fundamental atomic physics which underpins a lot of the research work on quantum sensors based on ultracold atoms, in particular atom interferometry.