Abstract:
A quasi-one-dimensional quantum dot containing two interacting electrons is analyzed in search of signatures of chaos. The two-electron energy spectrum is obtained by diagonalization of the Hamiltonian including the exact Coulomb interaction. We find that the level-spacing fluctuations closely follow a Wigner-Dyson distribution, which indicates the emergence of quantum signatures of chaos due to the Coulomb interaction in an otherwise nonchaotic system. In general, the Poincar� maps of a classical analog of this quantum-mechanical problem can exhibit a mixed classical dynamics. However, for the range of energies involved in the present system, the dynamics is strongly chaotic, aside from small regular regions. The system we study models a realistic semiconductor nanostructure, with electronic parameters typical of gallium arsenide. © 2001 American Physical Society.
Registro:
Documento: |
Artículo
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Título: | Interaction-induced chaos in a two-electron quantum dot system |
Autor: | Fendrik, A.J.; Sánchez, M.J.; Tamborenea, P.I. |
Filiación: | Departamento de F�sica, J. J. Giambiagi Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina
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Palabras clave: | gallium arsenide; article; chemical analysis; dynamics; electron; energy; molecular interaction; parameter; physics; quantum mechanics; signal transduction |
Año: | 2001
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Volumen: | 63
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Número: | 11
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DOI: |
http://dx.doi.org/10.1103/PhysRevB.63.115313 |
Título revista: | Physical Review B - Condensed Matter and Materials Physics
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Título revista abreviado: | Phys. Rev. B Condens. Matter Mater. Phys.
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ISSN: | 10980121
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10980121_v63_n11_p_Fendrik |
Referencias:
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Citas:
---------- APA ----------
Fendrik, A.J., Sánchez, M.J. & Tamborenea, P.I.
(2001)
. Interaction-induced chaos in a two-electron quantum dot system. Physical Review B - Condensed Matter and Materials Physics, 63(11).
http://dx.doi.org/10.1103/PhysRevB.63.115313---------- CHICAGO ----------
Fendrik, A.J., Sánchez, M.J., Tamborenea, P.I.
"Interaction-induced chaos in a two-electron quantum dot system"
. Physical Review B - Condensed Matter and Materials Physics 63, no. 11
(2001).
http://dx.doi.org/10.1103/PhysRevB.63.115313---------- MLA ----------
Fendrik, A.J., Sánchez, M.J., Tamborenea, P.I.
"Interaction-induced chaos in a two-electron quantum dot system"
. Physical Review B - Condensed Matter and Materials Physics, vol. 63, no. 11, 2001.
http://dx.doi.org/10.1103/PhysRevB.63.115313---------- VANCOUVER ----------
Fendrik, A.J., Sánchez, M.J., Tamborenea, P.I. Interaction-induced chaos in a two-electron quantum dot system. Phys. Rev. B Condens. Matter Mater. Phys. 2001;63(11).
http://dx.doi.org/10.1103/PhysRevB.63.115313