Engineering and imaging nonlocal spin dynamics in an optical cavity
Abstract/Contents
- Abstract
- Photon-mediated interactions between atoms coupled to an optical cavity are a powerful tool for engineering entangled states and many-body Hamiltonians. These applications motivate the construction of an optical cavity enabling coherent nonlocal spin interactions, with transverse optical access for high-resolution imaging and addressing of atomic sub-ensembles. Using this apparatus, we implement a nonlocal Heisenberg Hamiltonian, where the relative strength and sign of spin-exchange and Ising couplings are controllable parameters. This tunability enables the demonstration of an interaction-induced protection of spin coherence against single-atom dephasing terms. The optical access afforded by a near-concentric cavity facilitates local control and imaging of the magnetization for Hamiltonian tomography and spatially resolved detection of the spin coherence. Imaging also allows for the first observation of cavity-mediated spin mixing in a spin-1 system, a new mechanism for generating correlated atom pairs. Whereas the single-mode cavity most naturally mediates all-to-all couplings, I will also discuss progress in generalizing to control the distance-dependence of the interactions, with prospects in engineering the spatial structure of entanglement. I furthermore propose and analyze two specific protocols in quantum control enabled by strong and tunable atom-light interactions. I first introduce a protocol that enables entanglement-enhanced measurements near the Heisenberg limit while reducing technical requirements on detection. This is accomplished via an interaction-enhanced readout that relies on reversing the sign of global Ising interactions. Dispersive atom-light interactions also enable heralded schemes, in which a high-fidelity pure state is produced upon probabilistic detection of a single photon. In this context, I show how a time-shaped single-photon pulse can ``paint'' an arbitrary superposition of coherent spin states while avoiding infidelities due to finite cavity linewidth
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 | 2020; ©2020 |
| Publication date | 2020; 2020 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Author | Davis, Emily Jane |
|---|---|
| Degree supervisor | Schleier-Smith, Monika |
| Thesis advisor | Schleier-Smith, Monika |
| Thesis advisor | Hollberg, Leo (Leo William) |
| Thesis advisor | Safavi-Naeini, Amir H |
| Degree committee member | Hollberg, Leo (Leo William) |
| Degree committee member | Safavi-Naeini, Amir H |
| Associated with | Stanford University, Department of Physics. |
Subjects
| Genre | Theses |
|---|---|
| Genre | Text |
Bibliographic information
| Statement of responsibility | Emily Jane Davis |
|---|---|
| Note | Submitted to the Department of Physics |
| Thesis | Thesis Ph.D. Stanford University 2020 |
| Location | electronic resource |
Access conditions
- Copyright
- © 2020 by Emily Jane Davis
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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