Abstract:
We study the behavior of an open quantum system, with an N-dimensional space of states, whose density matrix evolves according to a nonunitary map defined in two steps: A unitary step, where the system evolves with an evolution operator obtained by quantizing a classically chaotic map (baker’s map and Harper’s map are the two examples we consider). A nonunitary step where the evolution operator for the density matrix mimics the effect of diffusion in the semiclassical (large [formula presented] limit. The process of decoherence and the transition from quantum to classical behavior are analyzed in detail by means of numerical and analytic tools. The existence of a regime where the entropy grows with a rate that is independent of the strength of the diffusion coefficient is demonstrated. The nature of the processes that determine the production of entropy is analyzed. © 2002 The American Physical Society.
Registro:
Documento: |
Artículo
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Título: | Decoherence for classically chaotic quantum maps |
Autor: | Bianucci, P.; Paz, J.P.; Saraceno, M. |
Filiación: | Departamento de Física “J.J. Giambiagi,” FCEN, UBA, Ciudad Universitaria, Pabellón 1, Buenos Aires, 1428, Argentina Unidad de Actividad Física, CNEA, Tandar, Buenos Aires, Argentina
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Año: | 2002
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Volumen: | 65
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Número: | 4
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Página de inicio: | 12
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DOI: |
http://dx.doi.org/10.1103/PhysRevE.65.046226 |
Título revista: | Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
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Título revista abreviado: | Phys Rev E.
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ISSN: | 1063651X
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1063651X_v65_n4_p12_Bianucci |
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Citas:
---------- APA ----------
Bianucci, P., Paz, J.P. & Saraceno, M.
(2002)
. Decoherence for classically chaotic quantum maps. Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, 65(4), 12.
http://dx.doi.org/10.1103/PhysRevE.65.046226---------- CHICAGO ----------
Bianucci, P., Paz, J.P., Saraceno, M.
"Decoherence for classically chaotic quantum maps"
. Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics 65, no. 4
(2002) : 12.
http://dx.doi.org/10.1103/PhysRevE.65.046226---------- MLA ----------
Bianucci, P., Paz, J.P., Saraceno, M.
"Decoherence for classically chaotic quantum maps"
. Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, vol. 65, no. 4, 2002, pp. 12.
http://dx.doi.org/10.1103/PhysRevE.65.046226---------- VANCOUVER ----------
Bianucci, P., Paz, J.P., Saraceno, M. Decoherence for classically chaotic quantum maps. Phys Rev E. 2002;65(4):12.
http://dx.doi.org/10.1103/PhysRevE.65.046226