Autori: Dusan Popov, Vjekoslav Sajfert, Ioan Zaharie

Editorial: Physica A, 387, p.4459-4474, 2008.

Rezumat:

In the paper we have constructed and examined the properties of the Gazeau-Klauder coherent states (GK-CSs) for the
pseudoharmonic oscillator (PHO), one of three possible kinds in order to define the coherent states for this oscillator potential. In
the second part, we have examined some nonclassical properties of these states. Our attention has been concentrated on the mixed
states (thermal states). The diagonal P-representation of the corresponding density operator and some thermal expectations for
the quantum canonical ideal gas of pseudoharmonic oscillators have also been examined. Like the CSs for the harmonic oscillator
(HO), the GK-CSs for the PHO can be useful in the quantum information theory (QIT).

c 2008 Elsevier B.V. All rights reserved.
PACS: 03.65.-w; 03.67.-a; 03.65.Ud
Keywords: Coherent state; Density operator;

Cuvinte cheie: stare coerenta, operator densitate, informatie cuantica, qubit // coherent state, density operator, quantum information, qubit

URL: http://www.sciencedirect.com/science/journal/03784371