Quantum control of spin systems in diamond
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Nuclear Science and Engineering, 2015.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2016
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| Online Access: | http://hdl.handle.net/1721.1/103731 |
| _version_ | 1811092736588120064 |
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| author | Hirose, Masashi, Ph. D. Massachusetts Institute of Technology |
| author2 | Paola Cappellaro. |
| author_facet | Paola Cappellaro. Hirose, Masashi, Ph. D. Massachusetts Institute of Technology |
| author_sort | Hirose, Masashi, Ph. D. Massachusetts Institute of Technology |
| collection | MIT |
| description | Thesis: Ph. D., Massachusetts Institute of Technology, Department of Nuclear Science and Engineering, 2015. |
| first_indexed | 2024-09-23T15:24:12Z |
| format | Thesis |
| id | mit-1721.1/103731 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T15:24:12Z |
| publishDate | 2016 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/1037312019-04-13T00:09:02Z Quantum control of spin systems in diamond Hirose, Masashi, Ph. D. Massachusetts Institute of Technology Paola Cappellaro. Massachusetts Institute of Technology. Department of Nuclear Science and Engineering. Massachusetts Institute of Technology. Department of Nuclear Science and Engineering. Nuclear Science and Engineering. Thesis: Ph. D., Massachusetts Institute of Technology, Department of Nuclear Science and Engineering, 2015. Cataloged from PDF version of thesis. Includes bibliographical references (pages 101-113). The precise control of a system which behaves according to the principles of quantum mechanics is an essential task in order to fully harness the unique properties of quantum mechanics, such as superposition and entanglement, for practical applications. Leveraging the quantum nature of the system would enable, for example, the implementation of quantum computation and quantum metrology. However, any realistic quantum system is inevitably coupled to its environment. The interaction with its surroundings irrevocably destroys the quantum nature of the system: mitigating decoherence is thus one of the central problems in quantum control. In this thesis, we develop novel control methods to protect a qubit from decoherence by two distinct approaches, and demonstrate them experimentally using the nitrogen-vacancy (NV) center in diamond. The first approach rests on an open-loop control scheme and is tailored to improve quantum sensing tasks. We develop a continuous dynamical decoupling (CoDD) method that allows us to tune the degree of protection from a dephasing environment. Exploiting this flexibility, we show that the CoDD can be used to measure magnetic fields with sensitivity comparable to existing methods, while providing superior versatility in practical experimental settings. This protocol can adapt to various sensing conditions that might occur in biological and materials science such as measurement time and sensitive frequency. The second approach exploits a coherent feedback protocol. We take advantage of a long-lived nuclear spin as an ancillary spin to protect the qubit of interest from decoherence. We show that the protocol protects the qubit as long as open-loop dynamical decoupling control schemes and it can be used against more general types of noise than the open-loop protocol. This method thus offers an alternative protocol to protect the qubit from decoherence in quantum computation and quantum metrology. by Masashi Hirose. Ph. D. 2016-07-18T20:04:50Z 2016-07-18T20:04:50Z 2015 2015 Thesis http://hdl.handle.net/1721.1/103731 953419400 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 113 pages application/pdf Massachusetts Institute of Technology |
| spellingShingle | Nuclear Science and Engineering. Hirose, Masashi, Ph. D. Massachusetts Institute of Technology Quantum control of spin systems in diamond |
| title | Quantum control of spin systems in diamond |
| title_full | Quantum control of spin systems in diamond |
| title_fullStr | Quantum control of spin systems in diamond |
| title_full_unstemmed | Quantum control of spin systems in diamond |
| title_short | Quantum control of spin systems in diamond |
| title_sort | quantum control of spin systems in diamond |
| topic | Nuclear Science and Engineering. |
| url | http://hdl.handle.net/1721.1/103731 |
| work_keys_str_mv | AT hirosemasashiphdmassachusettsinstituteoftechnology quantumcontrolofspinsystemsindiamond |