Formation of Faraday patterns in cigar-shaped Bose-Einstein condensates
dc.rights.license | CC-BY-NC-ND | |
dc.contributor.advisor | Straten, P. van der | |
dc.contributor.advisor | Groot, A. | |
dc.contributor.author | Smits, J. | |
dc.date.accessioned | 2013-08-16T17:01:33Z | |
dc.date.available | 2013-08-16 | |
dc.date.available | 2013-08-16T17:01:33Z | |
dc.date.issued | 2013 | |
dc.identifier.uri | https://studenttheses.uu.nl/handle/20.500.12932/14070 | |
dc.description.abstract | The radial trap frequency of an elongated harmonic trap containing a Bose-Einstein condensate is modulated. The free evolution of the condensate fraction is studied using phase-contrast imaging, revealing the dynamics of a single sample over a period of time. Multiple measurement series are combined to study the long-term behavior of samples created under similar experimental conditions. A high-order axial mode, the Faraday pattern, is observed. A simple parametric oscillator model is presented to describe the formation of this axial mode. This model suggests the radial quadrupole mode couples into the high-order axial mode through a parametric resonance. Also, the Faraday pattern is used to determine the speed of sound in the condensate as a function of density. The determined speed of sound deviates up to 20% from the Bogoliubov speed of sound for found densities. | |
dc.description.sponsorship | Utrecht University | |
dc.format.extent | 6726119 bytes | |
dc.format.mimetype | application/pdf | |
dc.language.iso | en | |
dc.title | Formation of Faraday patterns in cigar-shaped Bose-Einstein condensates | |
dc.type.content | Bachelor Thesis | |
dc.rights.accessrights | Open Access | |
dc.subject.keywords | Bose-Einstein condensate | |
dc.subject.keywords | Faraday wave | |
dc.subject.keywords | Faraday pattern | |
dc.subject.keywords | speed of sound | |
dc.subject.keywords | phase contrast imaging | |
dc.subject.courseuu | Natuur- en Sterrenkunde |