NMR studies of localization and out-of-time ordered commutators
Name
1134392141-MIT.pdf
Size
11.1 MB
Format
Adobe PDF
Checksum (MD5)
3e393949bed6ee02ed82ff5a728f755f
Author(s)
Wei, Ken Xuan.
Advisor(s)
Paola Cappellaro and Senthil Todadri.
Alternative Title
Nuclear Magnetic Resonance studies of localization and out-of-time ordered commutators
Date Issued
2018
Publisher
Massachusetts Institute of Technology
Abstract
This thesis presents a study of many-spin dynamics using a Nuclear Magnetic Resonance (NMR) simulator. A novel correlation metric was designed and experimentally measured in a solid state spin chain system to investigate the dynamics of quantum information transport. By using control techniques to tune the parameters of the system interactions, the effects of disorder and interaction on the dynamics were investigated experimentally. It was shown that in the absence disorder can quench the spread of quantum information; while with weak interaction and disorder, quantum information can spread, albeit slowly. Having found a connection between the correlation metric and the recently proposed out-of-time ordered commutator, the correlation metric was used to experimentally probe a transition between ergodic and prethermal dynamics. Future experiments using out-of-time ordered commutators as a tool to probe many-body localization transition are discussed.
Description
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 2018
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 109-120).
Subjects
Physics.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
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