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
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.
|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:||21 Apr 2015 08:20|