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(180) Production(s) de ANTEZZA M.
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Quantitative study of two- and three-dimensional strong localization of matter waves by atomic scatterers
Auteur(s): Antezza M.
(Séminaires)
Département de Physique de l’Université de Milan (Milan, FR), 2011-02-18 |
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Scattering-matrix approach to Casimir-Lifshitz force and heat transfer out of thermal equilibrium between arbitrary bodies
Auteur(s): Messina R., Antezza M.
(Article) Publié:
-Physical Review A Atomic, Molecular, And Optical Physics [1990-2015], vol. 84 p.042102 (2011)
Texte intégral en Openaccess :
Ref HAL: hal-00627218_v1
Ref Arxiv: 1108.4650
DOI: 10.1103/PhysRevA.84.042102
WoS: 000295483300003
Ref. & Cit.: NASA ADS
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117 Citations
Résumé: We study the radiative heat transfer and the Casimir-Lifshitz force occurring between two bodies in a system out of thermal equilibrium. We consider bodies of arbitrary shape and dielectric properties, held at two different temperatures and immersed in environmental radiation at a third different temperature. We derive explicit closed-form analytic expressions for the correlations of the electromagnetic field and for the heat transfer and Casimir-Lifshitz force in terms of the bodies' scattering matrices. We then consider some particular cases which we investigate in detail: the atom-surface and the slab-slab configurations.
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Spectral gaps for light in a periodic ensemble of ultracold atoms
Auteur(s): Antezza M.
Conference: JPS-ESPCI : “Journées de Physique Statistique” (Paris, FR, 2010-01-19)
Ref HAL: hal-01910102_v1
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Résumé: We address the general problem of the excitation spectrum for light coupled to scatterers having
quantum fluctuating positions around the sites of a periodic lattice. In addition to providing an imaginary
part to the spectrum, we show that these quantum fluctuations affect the real part of the spectrum, in a way
that we determine analytically. Our predictions may be observed with ultracold atoms in an optical lattice,
on a J 1⁄4 0 ! J0 1⁄4 1 narrow atomic transition. As a side result, we resolve a controversy for the
occurrence of a spectral gap in a fcc lattice.
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Two- and three-dimensional strong localization of matter waves by atomic scatterers
Auteur(s): Antezza M.
Conférence invité: MesoImage workshop : “Correlations, Fluctuations and Disorder ” (Grenoble, FR, 2010-12-15)
Ref HAL: hal-01910070_v1
Exporter : BibTex | endNote
Résumé: We study the strong localization of atomic matter waves in a disordered potential created by atoms pinned
at the nodes of a lattice, for both three-dimensional (3D) and two-dimensional (2D) systems. The localization
length of the matter wave, the density of localized states, and the occurrence of energy mobility edges (for the 3D
system), are numerically investigated as a function of the effective scattering length between the atomic matter
wave and the pinned atoms. Both positive and negative matter wave energies are explored. Interesting features
of the density of states are discovered at negative energies, where maxima in the density of bound states for the
system can be interpreted in terms of bound states of a matter wave atom with a few pinned atomic scatterers.
In 3D we found evidence of up to three mobility edges, one at positive energies, and two at negative energies,
the latter corresponding to transitions between extended and localized bound states. In 2D, no mobility edge is
found, and a rapid exponential-like increase of the localization length is observed at high energy.
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Light propagation in a periodic ensemble of ultracold atoms
Auteur(s): Antezza M.
(Séminaires)
Université Montpellier 2, GES (Montpellier, FR), 2010-05-20 |
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Quantitative study of two- and three-dimensional strong localization of matter waves by atomic scatterers
Auteur(s): Antezza M.
(Séminaires)
École Normale Supérieure (Paris, FR), 2010-10-29 |
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Quantitative study of two- and three-dimensional strong localization of matter waves by atomic scatterers
Auteur(s): Antezza M., Castin Yvan, David a. w. Hutchinson
(Article) Publié:
Physical Review A: Atomic, Molecular And Optical Physics, vol. 82 p.043602 (2010)
Ref HAL: hal-00828224_v1
DOI: 10.1103/PhysRevA.82.043602
WoS: 000282633800006
Exporter : BibTex | endNote
13 Citations
Résumé: We study the strong localization of atomic matter waves in a disordered potential created by atoms pinned at the nodes of a lattice, for both three-dimensional (3D) and two-dimensional (2D) systems. The localization length of the matter wave, the density of localized states, and the occurrence of energy mobility edges (for the 3D system), are numerically investigated as a function of the effective scattering length between the atomic matter wave and the pinned atoms. Both positive and negative matter wave energies are explored. Interesting features of the density of states are discovered at negative energies, where maxima in the density of bound states for the system can be interpreted in terms of bound states of a matter wave atom with a few pinned atomic scatterers. In 3D we found evidence of up to three mobility edges, one at positive energies, and two at negative energies, the latter corresponding to transitions between extended and localized bound states. In 2D, no mobility edge is found, and a rapid exponential-like increase of the localization length is observed at high energy.
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