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DOI | 10.1140/EPJB/E2010-10176-Y | ||||
Año | 2010 | ||||
Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
We study in 2-dimensions the superfluid density of periodically modulated states in the framework of the mean-field Gross-Pitaevskii model of a quantum solid. We obtain a full agreement for the superfluid fraction between a semi-theoretical approach and direct numerical simulations. As in 1-dimension, the superfluid density decreases exponentially with the amplitude of the particle interaction. We discuss the case when defects are present in this modulated structure. In the case of isolated defects (e.g. dislocations) the superfluid density only shows small changes. Finally, we report an increase of the superfluid fraction up to 50% in the case of extended macroscopical defects. We show also that this excess of superfluid fraction depends on the length of the complex network of grain boundaries in the system.
Ord. | Autor | Género | Institución - País |
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1 | SEPULVEDA-SALAZAR, NESTOR | Hombre |
Univ Paris Diderot - Francia
CNRS UPMC - Francia Laboratoire de Physique Statistique - Francia L'Institut Jean Le Rond d'Alembert - Francia Ecole Normale Superieure - Francia Institut Jean Le Rond d'Alembert - Francia |
2 | Josserand, Christophe | Hombre |
CNRS UPMC - Francia
L'Institut Jean Le Rond d'Alembert - Francia Institut Jean Le Rond d'Alembert - Francia |
3 | RICA MERY, SERGIO ANDRES | Hombre |
Universidad Adolfo Ibáñez - Chile
CNRS UNSA - Francia Institut de Physique de Nice - Francia |
Fuente |
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CONICYT (Chile) |
FONDECYT (Chile) |
Foundation Pierre-Gilles de Gennes |
Agence National de la Recherche, France (ANR COSTUME) |
Agradecimiento |
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It is our pleasure to thank Olivier Devauchelle and Peter Mason for their help. This work has been supported by the grant ANR-08-SYSC-004 of the Agence National de la Recherche, France (ANR COSTUME). N.S. acknowledges the financial support of CONICYT (Chile) and Foundation Pierre-Gilles de Gennes and S. R. also thanks the FONDECYT grant 1100289 (Chile). |