Decoherence in composite quantum open systems: The effectiveness of unstable degrees of freedom

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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 wit...

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Detalles Bibliográficos
Autor principal: Lombardo, F.C
Otros Autores: Villar, P.I
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2006
Acceso en línea:Registro en Scopus
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100 1 |a Lombardo, F.C. 
245 1 0 |a Decoherence in composite quantum open systems: The effectiveness of unstable degrees of freedom 
260 |c 2006 
270 1 0 |m Lombardo, F.C.; Departamento de Física Juan José Giambiagi, FCEyN UBA, Pabellón I, 1428 Buenos Aires, Argentina; email: lombardo@df.uba.ar 
506 |2 openaire  |e Política editorial 
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504 |a Lombardo, F.C., Mazzitelli, F.D., (1996) Phys. Rev. D, 53, p. 2001 
504 |a Lombardo, F.C., Mazzitelli, F.D., Rivers, R.J., (2001) Phys. Lett. B, 523, p. 317 
504 |a Lombardo, F.C., Mazzitelli, F.D., Rivers, R.J., (2003) Nucl. Phys. B, 672, p. 462 
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504 |a Paz, J.P., Zurek, W.H., (2001) Les Houches Session LXXII, pp. 533-614. , Coherent matter waves, eds. R. Kaiser, C. Westbrook and F. David EDP Sciences Springer-Verlag, Berlin 
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504 |a Blume-Kohout, R., Zurek, W.H., (2003) Phys. Rev. A, 68, p. 032104 
504 |a Elze, H.-T., Vacuum-induced Quantum Decoherence and the Entropy Puzzle, , hep-ph/9407377 
504 |a Lombardo, F.C., Mazzitelli, F.D., Monteoliva, D., (2000) Phys. Rev. D, 62, p. 045016 
504 |a Antunes, N.D., Lombardo, F.C., Monteoliva, D., (2001) Phys. Rev. E, 64, p. 066118 
504 |a Shiokawa, K., Kapral, R., (2002) J. Chem. Phys., 117, p. 7852 
504 |a Venugopalan, A., (1999) Phys. Rev. A, 61, p. 012102 
504 |a Lombardo, F.C., Villar, P.I., (2005) Phys. Rev. A, 72, p. 034103 
504 |a Feynman, R.P., Vernon, F.L., (1963) Ann. Phys. (NY), 24, p. 118 
504 |a Hu, B.L., Paz, J.P., Zhang, Y., (1992) Phys. Rev. D, 45, p. 2843 
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504 |a Paz, J.P., Habib, S., Zurek, W.H., (1993) Phys. Rev. D, 47, p. 488 
504 |a Hu, B.L., Paz, J.P., Zhang, Y., (1993) Phys. Rev. D, 47, p. 1576 
504 |a Lombardo, F.C., Villar, P.I., (2005) Phys. Lett. A, 336, p. 16 
504 |a Zurek, W.H., Paz, J.P., (1994) Phys. Rev. Lett., 72, p. 2508 
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520 3 |a 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.  |l eng 
536 |a Detalles de la financiación: Universidad de Buenos Aires 
536 |a Detalles de la financiación: Fundación Antorchas 
536 |a Detalles de la financiación: Agencia Nacional de Promoción Científica y Tecnológica 
536 |a Detalles de la financiación: Consejo Nacional de Investigaciones Científicas y Técnicas 
536 |a Detalles de la financiación: The authors thank Juan Pablo Paz for useful discussions and F. D. Mazzitelli and W. H. Zurek for comments during the early stage of this work. This work was supported by UBA, CONICET, Fundación Antorchas, and ANPCyT, Argentina. 
593 |a Departamento de Física Juan José Giambiagi, FCEyN UBA, Pabellón I, 1428 Buenos Aires, Argentina 
690 1 0 |a CHAOTIC ENVIRONMENTS 
690 1 0 |a DECOHERENCE 
690 1 0 |a OPEN SYSTEMS 
700 1 |a Villar, P.I. 
773 0 |d 2006  |g v. 20  |h pp. 2951-2976  |k n. 20  |p Int. J. Mod. Phys. B  |x 02179792  |w (AR-BaUEN)CENRE-598  |t International Journal of Modern Physics B 
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