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dc.contributor.advisorAndersen, Mikkel
dc.contributor.authorReynolds, Luke
dc.date.available2019-05-30T02:22:04Z
dc.date.copyright2019
dc.identifier.citationReynolds, L. (2019). Direct Measurements of Collisional Dynamics in Ultracold Atom Triads (Thesis, Master of Science). University of Otago. Retrieved from http://hdl.handle.net/10523/9342en
dc.identifier.urihttp://hdl.handle.net/10523/9342
dc.description.abstractIn this thesis, I present experimental methodology and results for direct measurements of ultracold few-atom collision dynamics, which allows quantum processes to be observed at the single event level. Three individual 85 Rb atoms are prepared in a specific quantum state and near-deterministically loaded into separate far-off resonance optical tweezers. The three trapping potentials are then merged, allowing the atoms to interact. By controlling the parameters of this interaction – duration and density of the atom triad – time-dependent atom loss from the trap due to two- and three-body inelastic collisions is observed. The loss rate from two-body collisions, K 2, is found to show a dependence on the trap beam intensity, which suggests that off-resonant photoassociative processes play a significant role in the system. In addition, the three-body recombination event rate constant, K 3 , is extracted from these loss measurements. The determination of K 3 in this manner marks a novel experimental measurement, as previous investigations have deduced the rate constant only by observing atom loss from a many-body sample. The measured few-body value for K3 shows consistency with its prediction from established theory illuminating a promising path for future experiments to take in the field of few-atom studies.
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherUniversity of Otago
dc.rightsAll items in OUR Archive are provided for private study and research purposes and are protected by copyright with all rights reserved unless otherwise indicated.
dc.subjectcold atoms
dc.subjectthree atom
dc.subjectthree body
dc.subjectrecombination
dc.subjectthree body recombination
dc.subjectultracold
dc.subjectRb
dc.subject85
dc.subjectRb85
dc.subjectcollisional dynamics
dc.subjectcollisional
dc.subjecttriad
dc.titleDirect Measurements of Collisional Dynamics in Ultracold Atom Triads
dc.typeThesis
dc.date.updated2019-05-30T00:56:38Z
dc.language.rfc3066en
thesis.degree.disciplinePhysics
thesis.degree.nameMaster of Science
thesis.degree.grantorUniversity of Otago
thesis.degree.levelMasters
otago.openaccessOpen
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