Two-spin measurements in exchange interaction quantum computers

Barrett, S. D. and Stace, T. M. (2006) Two-spin measurements in exchange interaction quantum computers. Physical Review B, 73 7: 075324-1-075324-5. doi:10.1103/PhysRevB.73.075324

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Author Barrett, S. D.
Stace, T. M.
Title Two-spin measurements in exchange interaction quantum computers
Journal name Physical Review B   Check publisher's open access policy
ISSN 1098-0121
Publication date 2006-02-15
Year available 2006
Sub-type Article (original research)
DOI 10.1103/PhysRevB.73.075324
Open Access Status File (Publisher version)
Volume 73
Issue 7
Start page 075324-1
End page 075324-5
Total pages 5
Place of publication College Pk
Publisher American Physical Society
Language eng
Abstract We propose and analyze a method for single shot measurement of the total spin of a two electron system in a coupled quantum dot or donor impurity structure, which can be used for readout in a quantum computer. The spin can be inferred by observing spin-dependent fluctuations of charge between the two sites, via a nearby electrometer. Realistic experimental parameters indicate that the fidelity of the measurement can be larger than 0.999 with existing or near-future technology. We also describe how our scheme can be used to implement various one- and two-qubit measurements, and hence to implement universal quantum computation.
Keyword Physics, Condensed Matter
Spin Measurement
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Physical Sciences Publications
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Citation counts: TR Web of Science Citation Count  Cited 12 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 11 times in Scopus Article | Citations
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Created: Fri, 25 Jan 2008, 16:46:50 EST