Optimal estimation of quantum dynamics

Acin, A., Jane, E. and Vidal, G. (2001) Optimal estimation of quantum dynamics. Physical Review A, 64 5: 050302-1-050302-4. doi:10.1103/PhysRevA.64.050302

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Author Acin, A.
Jane, E.
Vidal, G.
Title Optimal estimation of quantum dynamics
Journal name Physical Review A   Check publisher's open access policy
ISSN 1050-2947
1094-1622
Publication date 2001-11
Sub-type Article (original research)
DOI 10.1103/PhysRevA.64.050302
Open Access Status File (Publisher version)
Volume 64
Issue 5
Start page 050302-1
End page 050302-4
Total pages 4
Place of publication College Park, MD, United States
Publisher American Physical Society
Language eng
Abstract We construct the optimal strategy for the estimation of an unknown unitary transformation U is an element of SU(d). This includes, in addition to a convenient measurement on a probe system, finding which is the best initial state on which U is to act. When U is an element of SU(2), such an optimal strategy can be applied to simultaneously estimate both the direction and the strength of a magnetic field, and shows how to use a spin 1/2 particle to transmit information about a whole coordinate system instead of only a direction in space.
Keyword Optics
Physics, Atomic, Molecular & Chemical
Information
Ensembles
States
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Physical Sciences Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 36 times in Thomson Reuters Web of Science Article | Citations
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Created: Wed, 19 Sep 2007, 16:01:20 EST