Vortex based atom traps and atomic electrometry on a superconducting atom chip

This thesis focuses on the realization of the magnetic micro-trap using the vortex current in a superconducting structure and the measurement of the electric fi eld from the adsorbates. Persistent currents are induced in the type-II superconductor - yttrium barium copper oxide (YBCO) to generate a m...

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Main Author: Chan, Kin Sung
Other Authors: Rainer Helmut Dumke
Format: Theses and Dissertations
Language:English
Published: 2014
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Online Access:https://hdl.handle.net/10356/61882
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-618822023-02-28T23:36:17Z Vortex based atom traps and atomic electrometry on a superconducting atom chip Chan, Kin Sung Rainer Helmut Dumke School of Physical and Mathematical Sciences DRNTU::Science::Physics::Atomic physics::Quantum theory This thesis focuses on the realization of the magnetic micro-trap using the vortex current in a superconducting structure and the measurement of the electric fi eld from the adsorbates. Persistent currents are induced in the type-II superconductor - yttrium barium copper oxide (YBCO) to generate a magnetic potential for the ultracold atoms. Various programmable magnetic potentials are accomplished through the manipulation of the multiple magnetic eld pulses sequence used in imprinting the vortices. A special example is the achievement of self-sustaining trap which its trapping potential is formed without any requirement for external magnetic field. A demonstration of a single trap to a four traps is also shown, indicating a possible interferometry type of experiment using superconductors. Afterwards, a focus is shifted from the magnetic fi eld towards the electric fi eld of the superconducting atom chip. By using the Rydberg state of the rubidium atom, we perform Rydberg spectroscopy to measure the electric field above the atom chip at room temperature and cryogenic temperature. In addition, to study the temperature dependent adsorption, temperature is varied from room to cryogenic temperature. Model based on Langmuir equation is simulated to explain the experimental result. This thesis concludes with a summary and the future outlook. DOCTOR OF PHILOSOPHY (SPMS) 2014-12-04T09:17:57Z 2014-12-04T09:17:57Z 2014 2014 Thesis Chan, K. S. (2014). Vortex based atom traps and atomic electrometry on a superconducting atom chip. Doctoral thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/61882 10.32657/10356/61882 en 163 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Science::Physics::Atomic physics::Quantum theory
spellingShingle DRNTU::Science::Physics::Atomic physics::Quantum theory
Chan, Kin Sung
Vortex based atom traps and atomic electrometry on a superconducting atom chip
description This thesis focuses on the realization of the magnetic micro-trap using the vortex current in a superconducting structure and the measurement of the electric fi eld from the adsorbates. Persistent currents are induced in the type-II superconductor - yttrium barium copper oxide (YBCO) to generate a magnetic potential for the ultracold atoms. Various programmable magnetic potentials are accomplished through the manipulation of the multiple magnetic eld pulses sequence used in imprinting the vortices. A special example is the achievement of self-sustaining trap which its trapping potential is formed without any requirement for external magnetic field. A demonstration of a single trap to a four traps is also shown, indicating a possible interferometry type of experiment using superconductors. Afterwards, a focus is shifted from the magnetic fi eld towards the electric fi eld of the superconducting atom chip. By using the Rydberg state of the rubidium atom, we perform Rydberg spectroscopy to measure the electric field above the atom chip at room temperature and cryogenic temperature. In addition, to study the temperature dependent adsorption, temperature is varied from room to cryogenic temperature. Model based on Langmuir equation is simulated to explain the experimental result. This thesis concludes with a summary and the future outlook.
author2 Rainer Helmut Dumke
author_facet Rainer Helmut Dumke
Chan, Kin Sung
format Theses and Dissertations
author Chan, Kin Sung
author_sort Chan, Kin Sung
title Vortex based atom traps and atomic electrometry on a superconducting atom chip
title_short Vortex based atom traps and atomic electrometry on a superconducting atom chip
title_full Vortex based atom traps and atomic electrometry on a superconducting atom chip
title_fullStr Vortex based atom traps and atomic electrometry on a superconducting atom chip
title_full_unstemmed Vortex based atom traps and atomic electrometry on a superconducting atom chip
title_sort vortex based atom traps and atomic electrometry on a superconducting atom chip
publishDate 2014
url https://hdl.handle.net/10356/61882
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