Integrated chips and optical cavities for trapped ion quantum information processing

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2009. === Cataloged from PDF version of thesis. === Includes bibliographical references (p. 145-158). === Quantum information processing is a new and exciting field which uses quantum mechanical systems to perform information...

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Main Author: Leibrandt, David R
Other Authors: Isaac L. Chuang.
Format: Others
Language:English
Published: Massachusetts Institute of Technology 2010
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Online Access:http://hdl.handle.net/1721.1/53229
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spelling ndltd-MIT-oai-dspace.mit.edu-1721.1-532292019-05-02T16:33:49Z Integrated chips and optical cavities for trapped ion quantum information processing Leibrandt, David R Isaac L. Chuang. Massachusetts Institute of Technology. Dept. of Physics. Massachusetts Institute of Technology. Dept. of Physics. Physics. Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2009. Cataloged from PDF version of thesis. Includes bibliographical references (p. 145-158). Quantum information processing is a new and exciting field which uses quantum mechanical systems to perform information processing. At the heart of the excitement are quantum computation - which promises efficient algorithms for simulating physical systems, factoring, and searching unsorted databases - and quantum communication - which provides a provably secure communications protocol. Trapped ions show much promise for achieving large-scale quantum information processing. Experiments thus far have demonstrated small algorithms and entanglement of two remote ions. Current work focuses on scaling to large numbers of ions for quantum computation and interconversion between trapped ions and photons for quantum communication. This thesis addresses some of the challenges facing scaling and interconversion for trapped ion quantum information processing. The first part of the thesis describes the development of scalable, multiplexed ion trap chips for quantum computation. The ion trap chips are based on a new ion trap geometry, called the surface-electrode trap, in which all of the electrodes reside in a single plane. Three generations of surface-electrode traps are designed, fabricated, and tested - culminating with the demonstration of an ion trap chip microfabricated using standard silicon VLSI materials and processes for scalability to small trap size and large arrays of interconnected ion traps. The second part of the thesis presents an experiment that demonstrates cavity cooling, a method of laser cooling the motional state of trapped ions without decohering the internal qubit state. (cont.) Cavity cooling is demonstrated for the first time with trapped ions, and for the first time in the parameter regime where cooling to the motional ground state is possible. The measured cavity cooling dynamics are found to agree with a rate equation model without any free parameters. The third and final part of the thesis presents a theoretical proposal for interconversion between single trapped ion qubits and single photon qubits for quantum communication. The idea is to map the state of the single ion qubit to a superradiant collective state of several ions, which then couples strongly with single photons in an optical cavity. by David R. Leibrandt. Ph.D. 2010-03-25T15:17:58Z 2010-03-25T15:17:58Z 2009 2009 Thesis http://hdl.handle.net/1721.1/53229 535160917 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 169 p. application/pdf Massachusetts Institute of Technology
collection NDLTD
language English
format Others
sources NDLTD
topic Physics.
spellingShingle Physics.
Leibrandt, David R
Integrated chips and optical cavities for trapped ion quantum information processing
description Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2009. === Cataloged from PDF version of thesis. === Includes bibliographical references (p. 145-158). === Quantum information processing is a new and exciting field which uses quantum mechanical systems to perform information processing. At the heart of the excitement are quantum computation - which promises efficient algorithms for simulating physical systems, factoring, and searching unsorted databases - and quantum communication - which provides a provably secure communications protocol. Trapped ions show much promise for achieving large-scale quantum information processing. Experiments thus far have demonstrated small algorithms and entanglement of two remote ions. Current work focuses on scaling to large numbers of ions for quantum computation and interconversion between trapped ions and photons for quantum communication. This thesis addresses some of the challenges facing scaling and interconversion for trapped ion quantum information processing. The first part of the thesis describes the development of scalable, multiplexed ion trap chips for quantum computation. The ion trap chips are based on a new ion trap geometry, called the surface-electrode trap, in which all of the electrodes reside in a single plane. Three generations of surface-electrode traps are designed, fabricated, and tested - culminating with the demonstration of an ion trap chip microfabricated using standard silicon VLSI materials and processes for scalability to small trap size and large arrays of interconnected ion traps. The second part of the thesis presents an experiment that demonstrates cavity cooling, a method of laser cooling the motional state of trapped ions without decohering the internal qubit state. === (cont.) Cavity cooling is demonstrated for the first time with trapped ions, and for the first time in the parameter regime where cooling to the motional ground state is possible. The measured cavity cooling dynamics are found to agree with a rate equation model without any free parameters. The third and final part of the thesis presents a theoretical proposal for interconversion between single trapped ion qubits and single photon qubits for quantum communication. The idea is to map the state of the single ion qubit to a superradiant collective state of several ions, which then couples strongly with single photons in an optical cavity. === by David R. Leibrandt. === Ph.D.
author2 Isaac L. Chuang.
author_facet Isaac L. Chuang.
Leibrandt, David R
author Leibrandt, David R
author_sort Leibrandt, David R
title Integrated chips and optical cavities for trapped ion quantum information processing
title_short Integrated chips and optical cavities for trapped ion quantum information processing
title_full Integrated chips and optical cavities for trapped ion quantum information processing
title_fullStr Integrated chips and optical cavities for trapped ion quantum information processing
title_full_unstemmed Integrated chips and optical cavities for trapped ion quantum information processing
title_sort integrated chips and optical cavities for trapped ion quantum information processing
publisher Massachusetts Institute of Technology
publishDate 2010
url http://hdl.handle.net/1721.1/53229
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