Physics – Quantum Physics
Scientific paper
2005-04-14
Physics
Quantum Physics
14 pages, 1 figure, sequel of quant-ph/0503054 (J. Phys. A, v.38, pp. 6239 (2005)). To appear in PRA v. 72 (3), 2005
Scientific paper
10.1103/PhysRevA.72.042308
By means of a new mod(N)-invariant operator basis, s-parametrized phase-space functions associated with bounded operators in a finite-dimensional Hilbert space are introduced in the context of the extended Cahill-Glauber formalism, and their properties are discussed in details. The discrete Glauber-Sudarshan, Wigner, and Husimi functions emerge from this formalism as specific cases of s-parametrized phase-space functions where, in particular, a hierarchical process among them is promptly established. In addition, a phase-space description of quantum tomography and quantum teleportation is presented and new results are obtained.
Galetti Diogenes
Marchiolli Marcelo Aparecido
Ruzzi Maurizio
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