eprintid: 10115460
rev_number: 22
eprint_status: archive
userid: 608
dir: disk0/10/11/54/60
datestamp: 2020-12-11 11:29:24
lastmod: 2021-03-07 00:32:44
status_changed: 2020-12-11 11:29:24
type: thesis
metadata_visibility: show
creators_name: Morley, Joel
title: Towards a weak measurement of transverse momentum in a matter-wave interferometer
ispublished: unpub
divisions: UCL
divisions: A01
divisions: B04
divisions: C06
note: Copyright © The Author 2020. Original content in this thesis is licensed under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) Licence (https://creativecommons.org/licenses/by/4.0/). Any third-party copyright material present remains the property of its respective owner(s) and is licensed under its existing terms. Access may initially be restricted at the author’s request.
abstract: This thesis describes the construction of an atomic matter-wave interferometer, combined with a spin-state interferometer, used to weakly measure the average transverse momentum of the atoms. A velocity-tuneable cold atomic beam was constructed and characterised. By applying radiation pressure to a magneto-optical trap, the beam's velocity was selected between 1-52 ms-1. The beam was used to produce interference fringes in a matter-wave interferometer which consisted of a mutli-slit Si3Ni4 grating and a planar atom detector placed below the grating. The interference pattern was used to measure the average beam velocity and the Van der Waals coefficient between the atoms and the grating. This was the first instance of such a measurement. Below the grating a longitudinal Stern-Gerlach interferometer was constructed. The phase shift of the atom's spin, due to the Zeeman effect from the interferometer's magnetic field, was measured. The phase shift provided a measurement of the interferometer's magnetic field in the μT range. An experiment combining the two interferometers to weakly measure the atom's transverse momentum is described and modelled.
date: 2020-11-28
date_type: published
oa_status: green
full_text_type: other
thesis_class: doctoral_open
thesis_award: Ph.D
language: eng
thesis_view: UCL_Thesis
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 1829358
lyricists_name: Morley, Joel
lyricists_id: JJMOR12
actors_name: Morley, Joel
actors_id: JJMOR12
actors_role: owner
full_text_status: public
pages: 169
event_title: UCL
institution: UCL (University College London)
department: Physics & Astronomy
thesis_type: Doctoral
editors_name: Barker, P
citation:        Morley, Joel;      (2020)    Towards a weak measurement of transverse momentum in a matter-wave interferometer.                   Doctoral thesis  (Ph.D), UCL (University College London).     Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10115460/1/Thesis%20Draft%207.pdf