dc.contributor.advisor | Watson, Deborah K | |
dc.creator | Laing, William Blake | |
dc.date.accessioned | 2019-04-27T21:27:43Z | |
dc.date.available | 2019-04-27T21:27:43Z | |
dc.date.issued | 2008 | |
dc.identifier | 99211551902042 | |
dc.identifier.uri | https://hdl.handle.net/11244/318746 | |
dc.description.abstract | We generalize the harmonic-order N-body DPT method for an isotropically confined quantum system of identical interacting bosons to first-anharmonic order and, in principle, higher orders. We introduce a graphical decomposition of the perturbative expansion of the N-body Hamiltonian. We calculate the Clebsch-Gordon coefficient tensors that couple together 3 irreducible representations of SN analytically, and analytically transformed the graphical basis to collective coordinates. We calculate the N-body wavefunction and density profile in general and have demonstrated agreement with an analytic model. We apply this formalism to the exactly-solvable example of a trapped gas of atoms interacting with a (fully-interacting) harmonic-oscillator "Hooke's law" interaction and compare with the dimensional expansion of the exact ground-state wavefunction and density profile. We report progress on the example of a cold gas BEC (with zero angular momentum). | |
dc.format.extent | 212 pages | |
dc.format.medium | application.pdf | |
dc.language | en_US | |
dc.relation.requires | Adobe Acrobat Reader | |
dc.subject | Bose-Einstein condensation | |
dc.subject | Perturbation (Quantum dynamics) | |
dc.subject | Hamiltonian systems | |
dc.subject | Many-body problem | |
dc.title | Confined Quantum Systems: Beyond Harmonic Order in Dimensional Perturbation Theory | |
dc.type | text | |
dc.type | document | |
dc.thesis.degree | Ph.D. | |
ou.group | College of Arts and Sciences::Homer L. Dodge Department of Physics and Astronomy | |