Master Langevin equations: Origin of asymptotic diffusion
We extend the master-equation treatment of dynamical evolution of a system-plus-reservoir configuration including the propagation of initial correlations as a noise source. Specializing into the quantum harmonic oscillator coupled to a fermionic heat bath, we develop a model for the diffusion matrix...
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| Formato: | Artículo publishedVersion |
| Lenguaje: | Inglés |
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1993
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_1063651X_v47_n1_p300_Dorso |
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paperaa:paper_1063651X_v47_n1_p300_Dorso2023-06-12T16:49:02Z Master Langevin equations: Origin of asymptotic diffusion Physical Review E 1993;47(1):300-304 Dorso, C.O. Hernndez, E.S. Vega, J.L. We extend the master-equation treatment of dynamical evolution of a system-plus-reservoir configuration including the propagation of initial correlations as a noise source. Specializing into the quantum harmonic oscillator coupled to a fermionic heat bath, we develop a model for the diffusion matrix in the space of diagonal density operators. It can be shown that mean values of observables undergo Langevin-like motion and, in particular, that the mean value and dispersion of the oscillator quanta approach the canonical equilibrium values. A final interpretation of the characteristics and role of the noise source is given. © 1993 The American Physical Society. Fil:Dorso, C.O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Vega, J.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1993 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion application/pdf eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_1063651X_v47_n1_p300_Dorso |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| language |
Inglés |
| orig_language_str_mv |
eng |
| description |
We extend the master-equation treatment of dynamical evolution of a system-plus-reservoir configuration including the propagation of initial correlations as a noise source. Specializing into the quantum harmonic oscillator coupled to a fermionic heat bath, we develop a model for the diffusion matrix in the space of diagonal density operators. It can be shown that mean values of observables undergo Langevin-like motion and, in particular, that the mean value and dispersion of the oscillator quanta approach the canonical equilibrium values. A final interpretation of the characteristics and role of the noise source is given. © 1993 The American Physical Society. |
| format |
Artículo Artículo publishedVersion |
| author |
Dorso, C.O. Hernndez, E.S. Vega, J.L. |
| spellingShingle |
Dorso, C.O. Hernndez, E.S. Vega, J.L. Master Langevin equations: Origin of asymptotic diffusion |
| author_facet |
Dorso, C.O. Hernndez, E.S. Vega, J.L. |
| author_sort |
Dorso, C.O. |
| title |
Master Langevin equations: Origin of asymptotic diffusion |
| title_short |
Master Langevin equations: Origin of asymptotic diffusion |
| title_full |
Master Langevin equations: Origin of asymptotic diffusion |
| title_fullStr |
Master Langevin equations: Origin of asymptotic diffusion |
| title_full_unstemmed |
Master Langevin equations: Origin of asymptotic diffusion |
| title_sort |
master langevin equations: origin of asymptotic diffusion |
| publishDate |
1993 |
| url |
http://hdl.handle.net/20.500.12110/paper_1063651X_v47_n1_p300_Dorso |
| work_keys_str_mv |
AT dorsoco masterlangevinequationsoriginofasymptoticdiffusion AT hernndezes masterlangevinequationsoriginofasymptoticdiffusion AT vegajl masterlangevinequationsoriginofasymptoticdiffusion |
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1769810396609249280 |