Title: Experiments with ultracold atoms in optical and magnetic potentials

该项目使用现有的设备，通过激光冷却和磁捕获铷原子来生产温度为数十纳凯的量子气体。超冷原子的量子简并气体使得可以进行各种各样的实验来研究量子现象。目的和目的将实现一种新的方案，用于将超冷原子限制在偶极势中，该偶极势可以通过衍射光学元件如声光偏转器来动态控制和成形。该装置将使调查的性质，如量子隧道在新的限制几何形状和超流体流动。实验将扩大到使用两种物质的混合物，即Rb-87同位素的两种不同状态的原子或两种原子，从而给出一种物质的几个原子作为浸入量子气体中的“杂质”的条件。研究方法的新奇以前，牛津大学的实验工作是用磁阱中的单个原子物种进行的，但在不久的将来，将建立和测试双物种实验所需的额外激光器。Kathrin将开发一种将偶极力捕获与现有磁捕获相结合的系统。她还将致力于一个光学系统，以检测单个原子，使我们能够与高度不平衡的混合物，即，量子气体中的一些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部性质。与EPSRC的战略和研究领域保持一致（她的项目涉及EPSRC的研究领域）该项目的基础原子物理学支持了大量基于超冷原子的量子传感器的研究工作，特别是原子干涉。

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.