- Link:
- http://hdl.handle.net/1721.1/53229
- Collection:
-
- Subject
- Physics.
- Creator:
- Leibrandt, David R
- Contributors:
- Isaac L. Chuang. Massachusetts Institute of Technology. Dept. of Physics. Massachusetts Institute of Technology. Dept. of
Physics.
- Format
- 169 p.
- Language
- eng
- Publisher
- Massachusetts Institute of Technology
- Rights
- 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.
- Rights
- http://dspace.mit.edu/handle/1721.1/7582
- Type
- Thesis
- Description
- 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.
- Description
- (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.
- Description
- by David R. Leibrandt.
- Description
- Thesis (Ph. D.)--Massachusetts Institute of
Technology, Dept. of Physics, 2009.
- Description
- Cataloged from PDF version of
thesis.
- Description
- Includes bibliographical references (p.
145-158).
- Rights
- 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.
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