Spin Imbalanced Quasi-Two-Dimensional Fermi Gases
dc.contributor.advisor | Thomas, John E | |
dc.contributor.author | Ong, Willie Chuin Hong | |
dc.date.accessioned | 2015-09-01T20:05:58Z | |
dc.date.available | 2015-09-01T20:05:58Z | |
dc.date.issued | 2015 | |
dc.department | Physics | |
dc.description.abstract | Spin-imbalanced Fermi gases serve as a testbed for fundamental notions and are efficient table-top emulators of a variety of quantum matter ranging from neutron stars, the quark-gluon plasma, to high critical temperature superconductors. A macroscopic quantum phenomenon which occurs in spin-imbalanced Fermi gases is that of phase separation; in three dimensions, a spin-balanced, fully-paired superfluid core is surrounded by an imbalanced normal-fluid shell, followed by a fully polarized shell. In one-dimension, the behavior is reversed; a balanced phase appears outside a spin-imbalanced core. This thesis details the first density profile measurements and studies on spin-imbalanced quasi-2D Fermi gases, accomplished with high-resolution, rapid sequential spin-imaging. The measured cloud radii and central densities are in disagreement with mean-field Bardeen-Cooper-Schrieffer theory for a 2D system. Data for normal-fluid mixtures are well fit by a simple 2D polaron model of the free energy. Not predicted by the model is an observed phase transition to a spin-balanced central core above a critical polarization. | |
dc.identifier.uri | ||
dc.subject | Physics | |
dc.subject | Atomic physics | |
dc.subject | Quantum physics | |
dc.subject | Fermi gas | |
dc.subject | polaron | |
dc.subject | quasi-2D | |
dc.subject | Spin imbalance | |
dc.subject | Two Dimensional | |
dc.title | Spin Imbalanced Quasi-Two-Dimensional Fermi Gases | |
dc.type | Dissertation |