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Reconstructing a pure state of a spin s through three Stern-Gerlach measurements: II

Weigert, S. and Amiet, Jean-Pierre (1999) Reconstructing a pure state of a spin s through three Stern-Gerlach measurements: II. Journal of Physics A: Mathematical and General. L269-L274. ISSN 0305-4470

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Abstract

The density matrix of a spin s is fixed uniquely if the probabilities to obtain the value s upon measuring n.S are known for 4s(s+1) appropriately chosen directions n in space. These numbers are just the expectation values of the density operator in coherent spin states, and they can be determined in an experiment carried out with a Stern-Gerlach apparatus. Furthermore, the experimental data can be inverted providing thus a parametrization of the statistical operator by 4s(s+1) positive parameters.

Item Type: Article
Copyright, Publisher and Additional Information: © 1999 IOP Publishing Ltd. This is an author produced version of a paper published in Journal of Physics A: Mathematical and General.
Institution: The University of York
Academic Units: The University of York > Mathematics (York)
Depositing User: Repository Officer
Date Deposited: 22 Jun 2006
Last Modified: 16 Oct 2014 19:47
Published Version: http://dx.doi.org/10.1088/0305-4470/32/25/101
Status: Published
Refereed: Yes
Related URLs:
URI: http://eprints.whiterose.ac.uk/id/eprint/1353

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