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92 papers · 1 filter
Enhanced diffraction by a rectangular grating made of a negative phase--velocity (or negative index) material
Ricardo A. Depine, Akhlesh Lakhtakia, David R. Smith
The diffraction of electromagnetic plane waves by a rectangular grating formed by discrete steps in the interface of a homogeneous, isotropic, linear, negative phase--velocity (neg…
Static properties of the dissipative random quantum Ising ferromagnetic chain
Leticia F. Cugliandolo, Gustavo S. Lozano, Homero Lozza
We study the zero temperature static properties of dissipative ensembles of quantum Ising spins arranged on periodic one dimensional finite clusters and on an infinite chain. The s…
Quantum Magnets with Anisotropic Infinite Range Random Interactions
Liliana Arrachea, Marcelo J. Rozenberg
Using exact diagonalization techniques we study the dynamical response of the anisotropic disordered Heisenberg model for systems of S=1/2 spins with infinite range random exchange…
How Phase Transitions induce classical behaviour
R. J. Rivers, F. C. Lombardo
We continue the analysis of the onset of classical behaviour in a scalar field after a continuous phase transition, in which the system-field, the long wavelength order parameter o…
Dynamics and thermodynamics of fragment emission from excited sources
M. J. Ison, C. O. Dorso
In this paper we study the process of fragmentation of highly excited Lennard-Jones drops by introducing the concept of emitted fragments (clusters recognizable in configuration sp…
Eigenmodes of index-modulated layers with lateral PMLs
Diana C. Skigin
Maxwell equations are solved in a layer comprising a finite number of homogeneous isotropic dielectric regions ended by anisotropic perfectly matched layers (PMLs). The boundary-va…