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Arteaga, D.; Calzetta, E.; Roura, A.; Verdaguer, E. "Activation-Like Processes at Zero Temperature" (2003) International Journal of Theoretical Physics. 42(6):1257-1280
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Abstract:

We examine the possibility that a metastable quantum state could experiment a phenomenon similar to thermal activation but at zero temperature. To do that we study the real-time dynamics of the reduced Wigner function in a simple open quantum system: an anharmonic oscillator with a cubic potential linearly interacting with an environment of harmonic oscillators. Our results suggest that this activation-like phenomenon exists indeed as a consequence of the fluctuations induced by the environment and that its associated decay rate is comparable to the tunneling rate as computed by the instanton method, atleast for the particular potential of the system and the distribution of frequencies for the environment considered in this paper. However, we are not able to properly deal with the term which leads to tunneling in closed quantum systems, and a definite conclusion cannot be reached until tunneling and activation-like effects are considered simultaneously.

Registro:

Documento: Artículo
Título:Activation-Like Processes at Zero Temperature
Autor:Arteaga, D.; Calzetta, E.; Roura, A.; Verdaguer, E.
Filiación:Departament de Fisica Fonamental, CER Astrofis., Fis. Particules/C., Universitat de Barcelona, Barcelona, Spain
Departamento de Física, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires, Argentina
Department of Physics, University of Maryland, College Park, MD, United States
Departament de Fisica Fonamental, CER Astrofis., Fis. Particules/C., Universitat de Barcelona, Avenue Diagonal 647, 08028 Barcelona, Spain
Palabras clave:Open quantum systems; Quantum tunneling; Thermal activation
Año:2003
Volumen:42
Número:6
Página de inicio:1257
Página de fin:1280
DOI: http://dx.doi.org/10.1023/A:1025758616106
Título revista:International Journal of Theoretical Physics
Título revista abreviado:Int. J. Theor. Phys.
ISSN:00207748
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00207748_v42_n6_p1257_Arteaga

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Citas:

---------- APA ----------
Arteaga, D., Calzetta, E., Roura, A. & Verdaguer, E. (2003) . Activation-Like Processes at Zero Temperature. International Journal of Theoretical Physics, 42(6), 1257-1280.
http://dx.doi.org/10.1023/A:1025758616106
---------- CHICAGO ----------
Arteaga, D., Calzetta, E., Roura, A., Verdaguer, E. "Activation-Like Processes at Zero Temperature" . International Journal of Theoretical Physics 42, no. 6 (2003) : 1257-1280.
http://dx.doi.org/10.1023/A:1025758616106
---------- MLA ----------
Arteaga, D., Calzetta, E., Roura, A., Verdaguer, E. "Activation-Like Processes at Zero Temperature" . International Journal of Theoretical Physics, vol. 42, no. 6, 2003, pp. 1257-1280.
http://dx.doi.org/10.1023/A:1025758616106
---------- VANCOUVER ----------
Arteaga, D., Calzetta, E., Roura, A., Verdaguer, E. Activation-Like Processes at Zero Temperature. Int. J. Theor. Phys. 2003;42(6):1257-1280.
http://dx.doi.org/10.1023/A:1025758616106