dc.contributor.advisor | Sudbø, Asle | |
dc.contributor.author | Halse Rygh, Jonas | |
dc.date.accessioned | 2021-09-28T18:34:24Z | |
dc.date.available | 2021-09-28T18:34:24Z | |
dc.date.issued | 2020 | |
dc.identifier | no.ntnu:inspera:54708082:33898473 | |
dc.identifier.uri | https://hdl.handle.net/11250/2785513 | |
dc.description.abstract | Denne masteroppgaven omhandler studiet av en to-komponent, syntetisk spin-bane koblet, svakt
vekselvirkende Bose gass ved ultra kalde temperaturer bundet til et Bravais gitter. Gjennom
en middelfeltstilnærming og Bose-Hubbard modellen vil eksitasjonsspektra til kvasipartiklene
i det resiproke rom gis, gyldig for superfluid fasen. Disse eksitasjonsspektrene blir brukt til å
generere et fasediagram som inkluderer eksitasjoner, og vil sammenliknes med fasediagrammet
for et rent kondensat. I tillegg vil mulighetene for en superfluid kritisk hastighet studert, og
uttrykkene for de kjemiske potensialene og kondensat-tetthetene analysert numerisk. | |
dc.description.abstract | This Master’s thesis deals with the study of the two-component, synthetically spin-orbit coupled,
weakly interacting Bose gas at ultra cold temperatures on a Bravais lattice. By way of mean-field
theory and the Bose-Hubbard model, the excitation spectrum of the emerging quasiparticles in
reciprocal space is obtained, valid in the superfluid phase. The excitation spectrum is then used
to create a phase diagram, which is compared with the phase diagram for a pure condensate.
Furthermore, the possibility of a superfluid critical velocity is investigated, and expressions for
the chemical potentials and condensate densities are numerically analyzed. | |
dc.language | | |
dc.publisher | NTNU | |
dc.title | Study of the Quasiparticle Excitation Spectrum for the Ultracold, Two-Component, Synthetically Spin-Orbit Coupled, Weakly Interacting Bose Gas Residing on a Bravais Lattice | |
dc.type | Master thesis | |