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Title: Experiments with ultracold atoms in optical and magnetic potentials

标题：超冷原子光势和磁势实验

基本信息

批准号：
1742766
负责人：
金额：
--
依托单位：
University of Oxford
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2015
资助国家：
英国
起止时间：
2015 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=studentship-1742766
关键词：
Title Experiments ultracold atoms optical

项目摘要

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.

该项目使用现有的设备，通过激光冷却和铷原子的磁捕获，在几十纳米开尔文的温度下产生量子气体。超冷原子的量子简并气体使各种各样的实验得以进行，以研究量子现象。*目的和目标将实施一种新的方案，用于将超冷原子限制在偶极子势中，该偶极子势可以由衍射光学元件（如声光偏转器）动态控制和塑造。该装置将使研究诸如新约束几何中的量子隧道效应和超流体流动等特性成为可能。实验将扩展到使用两种混合物，即Rb-87同位素的两种不同状态的原子或两种原子，从而提供一种原子的几个原子作为沉浸在量子气体中的“杂质”的条件。*研究方法的新颖性：以前，牛津大学的实验工作是在磁阱中对单原子进行的，但在不久的将来，双原子实验所需的额外激光器将被建立和测试。凯瑟琳将开发一种结合偶极力捕获和现有磁捕获的系统。她还将研究一种光学系统，用于探测单个原子，从而使我们能够处理高度不平衡的混合物，即量子气体中的一些杂质原子。这些杂质可以用新的方式探测这些量子系统的局部特性。*与EPSRC的战略和研究领域保持一致（她的项目与EPSRC的研究领域有关）该项目基础原子物理学支撑了许多基于超冷原子的量子传感器的研究工作，特别是原子干涉测量。