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Cataldo, H.M.; Hernández, E.S.; Dorso, C.O. "Dynamical aspects of phonon-phonon coupling in collective mode damping" (1987) Physica A: Statistical Mechanics and its Applications. 142(1-3):498-516
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Abstract:

We present an extension of the Quantal Brownian Motion (QBM) model of vibration damping that incorporates phonon-phonon or phonon-(two-particle-two-hole) interactions as sources of dissipative evolution of the excited mode. Starting from the Schrödinger-on Neumann equation of motion, a reduction procedure combined with the proper approximations leads to coupled, nonlinear master equations for the density vectors of the separate oscillators. The fermionic heat bath remains equilibrated at temperature T. The evolution of the phonon system is numerically analyzed under different initial conditions that simulate excitation of one or more collective vibrations, for several strengths of mode-mode coupling. It is found that in the majority of cases the system reaches statistical equilibrium with relaxation times that can be extracted from the numerical treatment. © 1987.

Registro:

Documento: Artículo
Título:Dynamical aspects of phonon-phonon coupling in collective mode damping
Autor:Cataldo, H.M.; Hernández, E.S.; Dorso, C.O.
Filiación:Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina
Año:1987
Volumen:142
Número:1-3
Página de inicio:498
Página de fin:516
DOI: http://dx.doi.org/10.1016/0378-4371(87)90038-0
Título revista:Physica A: Statistical Mechanics and its Applications
Título revista abreviado:Phys A Stat Mech Appl
ISSN:03784371
CODEN:PHYAD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03784371_v142_n1-3_p498_Cataldo

Referencias:

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Citas:

---------- APA ----------
Cataldo, H.M., Hernández, E.S. & Dorso, C.O. (1987) . Dynamical aspects of phonon-phonon coupling in collective mode damping. Physica A: Statistical Mechanics and its Applications, 142(1-3), 498-516.
http://dx.doi.org/10.1016/0378-4371(87)90038-0
---------- CHICAGO ----------
Cataldo, H.M., Hernández, E.S., Dorso, C.O. "Dynamical aspects of phonon-phonon coupling in collective mode damping" . Physica A: Statistical Mechanics and its Applications 142, no. 1-3 (1987) : 498-516.
http://dx.doi.org/10.1016/0378-4371(87)90038-0
---------- MLA ----------
Cataldo, H.M., Hernández, E.S., Dorso, C.O. "Dynamical aspects of phonon-phonon coupling in collective mode damping" . Physica A: Statistical Mechanics and its Applications, vol. 142, no. 1-3, 1987, pp. 498-516.
http://dx.doi.org/10.1016/0378-4371(87)90038-0
---------- VANCOUVER ----------
Cataldo, H.M., Hernández, E.S., Dorso, C.O. Dynamical aspects of phonon-phonon coupling in collective mode damping. Phys A Stat Mech Appl. 1987;142(1-3):498-516.
http://dx.doi.org/10.1016/0378-4371(87)90038-0