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Dynamics, A Displacement And The Superfluidity Density Of A Bose Gas In An Optical Lattice

Author
Yanay, Yariv
Abstract
Advances in experimental atomic systems have given us access to highly tunable quantum systems, and to an unprecedented range of observables of these systems. One fundamental system that has been made accessible in this way is a gas of bosons trapped in a periodic potential. We present here a several studies of the many-body physics of bosons in optical lattices. We discuss the ferromagnetic effects of a single vacancy in a two-species gas on a lattice. We present a derivation of the superfluid density, the order parameter for the superfluid state, and discuss the mathematical subtleties of calculating it. Finally, we calculate the dynamics of bosonic lattice systems, in the presence of inelastic light scattering used as a density measurement, and during a ramp of the interaction strength from the Mott to the superfluid phase.
Date Issued
2015-08-17Subject
Bosons; Optical Lattices; Dynamics
Committee Chair
Mueller,Erich
Committee Member
Vengalattore,Mukund; Ginsparg,Paul Henry
Degree Discipline
Physics
Degree Name
Ph. D., Physics
Degree Level
Doctor of Philosophy
Type
dissertation or thesis