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.
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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