2026-09-23T15:58:40Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/84832022-01-13T07:54:41Zcom_1721.1_7582com_1721.1_7581col_1721.1_131022
Mildred S. Dresselhaus and Seth Lloyd.
Tian, Lin, 1971-
Massachusetts Institute of Technology. Dept. of Physics.
Massachusetts Institute of Technology. Department of Physics
2005-08-23T20:31:31Z
2005-08-23T20:31:31Z
2002
2002
http://hdl.handle.net/1721.1/8483
50759171
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Physics, 2002.
Includes bibliographical references (p. 197-213).
A superconducting quantum bit can be made with three nano-scale Josephson junctions connected in series. In this thesis, various aspects of this qubit are studied. It is shown numerically that the qubit behaves as a giant magnetic dipole with quantum tunneling between the two qubit states. The natural coupling between qubits plus the manipulation on a single qubit state provides the building blocks for universal quantum computing. The state of the qubit can be determined by measuring its flux with a SQUID. The measurement efficiency and measurement-induced decoherence are investigated. A coherent transition assisted scheme is designed for a projective measurement on the qubit. A general method is developed to study qubit decoherence by environmental noise. The dynamic control approach is applied for preventing off-resonant leakage during gate operations and for de-coupling the qubit from noise.
by Lin Tian.
Ph.D.
213 p.
15061459 bytes
15061211 bytes
application/pdf
application/pdf
eng
Massachusetts Institute of Technology
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http://dspace.mit.edu/handle/1721.1/7582
Physics.
A superconducting flux QuBit : measurement, noise and control
Thesis
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