Wavefunction-based simulations : dynamics of quantum many-body systems
Abstract/Contents
- Abstract
- Many exotic phases of matter, such as quantum spin liquid (QSL) and high temperature superconductivity, are associated with strong correlations between constituent particles. Yet theoretical analysis is largely hindered by the strong interactions. Numeric simulations, although facing the challenge of exponential complexity, have provided valuable theoretical insights and connections to experiments. In this work, I present wavefunction-based numerical methods to study strongly correlated systems with an emphasis on dynamics, which can provide extra information about the excitations in the system, connect theoretical modeling with experimental spectroscopies and can reveal interactions in the system. After an overview, I will first discuss characterizations of the QSL on a triangular lattice through dynamical spin structure factor and Raman scattering. The QSL phase shows distinct spectral features, among which a prominent chiral excitation in Raman spectra signals proximity to chiral ordering. I then present the study of salient spectral features observed in recent angle resolved photoemission spectroscopy experiment on a one-dimensional cuprate. These spectral features can be well reproduced by adding extended electron-phonon couplings, which enhances superconducting pairing correlations in 1D and may help the establishment of superconductivity in 2D. Finally, I present a time-dependent nonequilibrium study and show cuprates superconductivity could potentially be enhanced via laser driven photodoping. I conclude with some ideas to go beyond the results presented in this thesis.
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 | 2024; ©2024 |
| Publication date | 2024; 2024 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Author | Tang, Ta, (Researcher in applied physics) |
|---|---|
| Degree supervisor | Devereaux, Thomas Peter, 1964- |
| Degree supervisor | Shen, Zhi-Xun |
| Thesis advisor | Devereaux, Thomas Peter, 1964- |
| Thesis advisor | Shen, Zhi-Xun |
| Thesis advisor | Kivelson, Steven |
| Degree committee member | Kivelson, Steven |
| Associated with | Stanford University, School of Humanities and Sciences |
| Associated with | Stanford University, Department of Applied Physics |
Subjects
| Genre | Theses |
|---|---|
| Genre | Text |
Bibliographic information
| Statement of responsibility | Ta Tang. |
|---|---|
| Note | Submitted to the Department of Applied Physics. |
| Thesis | Thesis Ph.D. Stanford University 2024. |
| Location | https://purl.stanford.edu/yg525gf3464 |
Access conditions
- Copyright
- © 2024 by Ta Tang
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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