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Mostrando ítems 1-10 de 13
Artículo
Dark lattice solitons in one-dimensional waveguide arrays with defocusing saturable nonlinearity and alternating couplings
(2012)
In the present work, we examine “binary” waveguide arrays, where the coupling between adjacent sites alternates between two distinct values C1 and C2 and a saturable nonlinearity is present on each site. Motivated by ...
Artículo
Modelling the environmental behaviour of pollutants in Algeciras Bay (south Spain)
(Elsevier, 2012)
An environmental study of Algeciras Bay is carried out through numerical modelling. First, a 2D barotrop ic model is applied to calculate tides and mean circulation. Results of this model are used by a sediment transport ...
Artículo
Nonlinear Dirac equation solitary waves in external fields
(2012)
We consider nonlinear Dirac equations (NLDE's) in the 1+1 dimension with scalar-scalar self-interaction g2κ+1(Ψ¯¯¯Ψ)κ+1 in the presence of various external electromagnetic fields. We find exact solutions for special external ...
Artículo
Compositional and structural properties of nanostructured ZnO thin films grown by oblique angle reactive sputtering deposition: effect on the refractive index
(IOP Science, 2012-12-17)
In this work, we report the successful growth of ZnO nanostructured films by oblique angle magnetron sputtering deposition (OAD) from a Zn target in a mixture gas of Ar/O2. The film microstructure and the surface morphology ...
Artículo
Vibrational mechanics in an optical lattice: controlling transport via potential renormalization
(American Physical Society, 2012)
We demonstrate theoretically and experimentally the phenomenon of vibrational resonance in a periodic potential, using cold atoms in an optical lattice as a model system. A high-frequency (HF) drive, with a frequency ...
Capítulo de Libro
Symmetry-breaking Effects for Polariton Condensates in Double-Well Potentials
(Springer Verlag, 2012)
We study the existence, stability, and dynamics of symmetric and anti-symmetric states of quasi-one-dimensional polariton condensates in double-well potentials, in the presence of nonresonant pumping and nonlinear damping. ...
Artículo
Control of transport in two-dimensional systems via dynamical decoupling of degrees of freedom with quasiperiodic driving fields
(American Physical Society, 2012)
We consider the problem of the control of transport in higher-dimensional periodic structures by applied ac fields. In a generic crystal, transverse degrees of freedom are coupled, and this makes the control of motion ...
Artículo
Beating dark-dark solitons in Bose-Einstein condensates
(2012)
Motivated by recent experimental results, we study beating dark-dark solitons as a prototypical coherent structure that emerges in two-component Bose-Einstein condensates. We showcase their connection to dark- bright ...
Artículo
Structural and mechanical properties of Au alloyed Al\O sputter deposited coatings
(ScienceDirect, 2012-02-15)
This paper is focused on the sputtering process and on the structure, chemical composition and mechanical properties of coatings consisting of Al\O dielectric matrix incorporated with increasing Au contents. The maximum ...
Artículo
Coordination chemistry of titanium and zinc in Ti(1−x)Zn2xO2 (0 ≤ x ≤ 1) ultrathin films grown by DC reactive magnetron sputtering
(Royal Society of Chemistry, 2012)
XANES and RBS were used to explore the structural phase and composition transitions of ultrathin films with Ti(12x)Zn2xO2 stoichiometries, from very low (y0.5 at.%) to high (y25 at.%) titanium content. In this way, the ...