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Abstract:

The effect induced by an environment on a composite quantum system is studied. The model considers the composite system as comprised by a subsystem A coupled to a subsystem B which is also coupled to an external environment. We studied all possible four combinations of subsystems A and B made up with a harmonic oscillator and an upside down oscillator. We analyzed the decoherence suffered by subsystem A due to an effective environment composed by subsystem B and the external reservoir. In all the cases we found that subsystem A decoheres even though it interacts with the environment only through its sole coupling to B. However, the effectiveness of the diffusion depends on the unstable nature of subsystem A and B. Therefore, the role of this degree of freedom in the effective environment is analyzed in detail. © World Scientific Publishing Company.

Registro:

Documento: Artículo
Título:Decoherence in composite quantum open systems: The effectiveness of unstable degrees of freedom
Autor:Lombardo, F.C.; Villar, P.I.
Filiación:Departamento de Física Juan José Giambiagi, FCEyN UBA, Pabellón I, 1428 Buenos Aires, Argentina
Palabras clave:Chaotic environments; Decoherence; Open systems
Año:2006
Volumen:20
Número:20
Página de inicio:2951
Página de fin:2976
DOI: http://dx.doi.org/10.1142/S0217979206034959
Título revista:International Journal of Modern Physics B
Título revista abreviado:Int. J. Mod. Phys. B
ISSN:02179792
CODEN:IJPBE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02179792_v20_n20_p2951_Lombardo

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Citas:

---------- APA ----------
Lombardo, F.C. & Villar, P.I. (2006) . Decoherence in composite quantum open systems: The effectiveness of unstable degrees of freedom. International Journal of Modern Physics B, 20(20), 2951-2976.
http://dx.doi.org/10.1142/S0217979206034959
---------- CHICAGO ----------
Lombardo, F.C., Villar, P.I. "Decoherence in composite quantum open systems: The effectiveness of unstable degrees of freedom" . International Journal of Modern Physics B 20, no. 20 (2006) : 2951-2976.
http://dx.doi.org/10.1142/S0217979206034959
---------- MLA ----------
Lombardo, F.C., Villar, P.I. "Decoherence in composite quantum open systems: The effectiveness of unstable degrees of freedom" . International Journal of Modern Physics B, vol. 20, no. 20, 2006, pp. 2951-2976.
http://dx.doi.org/10.1142/S0217979206034959
---------- VANCOUVER ----------
Lombardo, F.C., Villar, P.I. Decoherence in composite quantum open systems: The effectiveness of unstable degrees of freedom. Int. J. Mod. Phys. B. 2006;20(20):2951-2976.
http://dx.doi.org/10.1142/S0217979206034959