Weigert, S. and Amiet, Jean-Pierre (1999) Coherent states and the reconstruction of pure spin states. Journal of Optics B: Quantum and Semiclassical Optics. L5-L8. ISSN 1464-4266Full text available as:
Coherent states provide an appealing method to reconstruct efficiently the pure state of a quantum mechanical spin s. A Stern-Gerlach apparatus is used to measure (4s + 1) expectations of projection operators on appropriate coherent states in the unknown state. These measurements are compatible with a finite number of states which can be distinguished, in the generic case, by measuring one more probability. In addition, the present technique shows that the zeros of a Husimi distribution do have an operational meaning: they can be identified directly by measurements with a Stem-Gerlach apparatus. This result comes down to saying that it is possible to resolve experimentally structures in quantum phase space which are smaller than (h) over bar.
|Copyright, Publisher and Additional Information:||© 1999 IOP Publishing Ltd. This is an author produced version of a paper published in Journal of Optics B: Quantum and Semiclassical Optics.|
|Keywords:||quantum state reconstruction, coherent states, Husimi distribution|
|Academic Units:||The University of York > Mathematics (York)|
|Depositing User:||Repository Officer|
|Date Deposited:||23 Jun 2006|
|Last Modified:||17 Oct 2013 14:39|