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