eprintid: 32365
rev_number: 12
eprint_status: archive
userid: 7030
dir: disk0/00/03/23/65
datestamp: 2022-11-16 13:03:58
lastmod: 2022-12-06 08:19:40
status_changed: 2022-11-16 13:03:58
type: doctoralThesis
metadata_visibility: show
creators_name: Hans, Maurus
title: Physical Computing on a Versatile Setup for Ultra-cold Potassium
subjects: ddc-530
divisions: i-130700
adv_faculty: af-13
abstract: This thesis reports on a setup for a quasi two-dimensional Bose-Einstein condensate of 39K, which is an isotope well suited for interaction tuning due to a broad magnetic Feshbach resonance, and presents the application of the setup to a specific type of physical computing.

The first part gives an overview of the experimental components to prepare a quasi two-dimensional condensate with a configurable shape. Particular focus is put on the control of the magnetic field for the adjustment of atomic interactions and the configurable potential, which is realized with a digital micromirror device. The imaging setup is presented in detail and a strategy for absorption imaging at high magnetic field is elaborated. This strategy is necessary to properly exploit the magnetic Feshbach resonance. It relies on a scheme for an approximately closed four level optical cycle.

The second part introduces an approach for the implementation of a shallow artificial neural network with a physical system. Subsequently, a specific implementation that utilizes a quasi one-dimensional Bose-Einstein condensate is presented. Regression and interpolation of a non-inear function are performed successfully as a proof-of-concept, and the results are compared for different experimental parameters.
date: 2022
id_scheme: DOI
id_number: 10.11588/heidok.00032365
ppn_swb: 1824492618
own_urn: urn:nbn:de:bsz:16-heidok-323654
date_accepted: 2022-11-08
advisor: HASH(0x561a62857118)
language: eng
bibsort: HANSMAURUSPHYSICALCO2022
full_text_status: public
place_of_pub: Heidelberg
citation:   Hans, Maurus  (2022) Physical Computing on a Versatile Setup for Ultra-cold Potassium.  [Dissertation]     
document_url: https://archiv.ub.uni-heidelberg.de/volltextserver/32365/1/0_MainDissFinal.pdf