Measuring rapidity and momentum distributions of dipolar 1D quantum gases
Abstract/Contents
- Abstract
- Quantum integrable systems such as Lieb-Liniger model are naturally characterized by the momenta of the long-lived quasi-particles, or rapidities. The mapping between rapidities and physical momenta is highly non-trivial in a strongly correlated system, and it is only until recently becoming experimentally accessible in strongly interacting cold atom setups. The observation of rapidity distributions provides a great opportunity to understand quantum near-integrable systems from both experiment and theory perspectives. In this dissertation, I present our work on characterizing the rapidity distribution of a Lieb-Liniger model augmented with long-range dipole-dipole interaction (DDI). This near-integrable system is realized with bosonic dysprosium quantum gases confined in quasi-one-dimensional (1D) waveguides. The contact interaction can be tuned via confinement-induced resonances, while the long-range DDI is controlled by dipole alignment fixed by the orientation of an external magnetic field. The rapidity distribution of dipolar 1D gases is revealed with a modified time-of-flight sequence, in which the system undergoes the evolution of 1D integrable dynamics, mapping rapidities onto measurable momenta. Our measurement near the hard-core boson limit shows a great agreement with the finite-temperature Lieb-Liniger theory. DDI has more significant effects with intermediate contact interaction strength, while the measurement is still in qualitative agreements with an Lieb-Liniger model that includes the short-range part of the DDI in the contact interaction strength. This result suggests the possibility of describing dipolar 1D gases with the Lieb-Liniger model.
Description
| Type of resource | text |
|---|---|
| Form | electronic resource; remote; computer; online resource |
| Extent | 1 online resource. |
| Place | California |
| Place | [Stanford, California] |
| Publisher | [Stanford University] |
| Copyright date | 2022; ©2022 |
| Publication date | 2022; 2022 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Author | Li, Kuan-Yu |
|---|---|
| Degree supervisor | Lev, Benjamin L |
| Thesis advisor | Lev, Benjamin L |
| Thesis advisor | Heinz, Tony F |
| Thesis advisor | Khemani, Vedika |
| Degree committee member | Heinz, Tony F |
| Degree committee member | Khemani, Vedika |
| Associated with | Stanford University, Department of Applied Physics |
Subjects
| Genre | Theses |
|---|---|
| Genre | Text |
Bibliographic information
| Statement of responsibility | Kuan-Yu Li. |
|---|---|
| Note | Submitted to the Department of Applied Physics. |
| Thesis | Thesis Ph.D. Stanford University 2022. |
| Location | https://purl.stanford.edu/dd434rd2508 |
Access conditions
- Copyright
- © 2022 by Kuan-Yu Li
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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