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70 papers · 1 filter
Uniform semiclassical approximation in quantum statistical mechanics
C. A. A. de Carvalho, R. M. Cavalcanti, E. S. Fraga +1
We present a simple method to deal with caustics in the semiclassical approximation to the partition function of a one-dimensional quantum system. The procedure, which makes use of…
Reentrant behaviour and universality in the Anderson transition
S. L. A. de Queiroz
The three-dimensional Anderson model with a rectangular distribution of site disorder displays two distinct localization-delocalization transitions, against varying disorder intens…
The Heavy Dirac Monopole
P. Pitanga
We present a model for the Dirac magnetic monopole, suitable for the strong coupling regime. The magnetic monopole is static, has charge g and mass M, occupying a volume of radius…
Modeling of C stars with core/mantle grains: Amorphous carbon + SiC
S. Lorenz-Martins, F. X. de Araujo, S. J. Codina Landaberry +2
A set of 45 dust envelopes of carbon stars has been modeled. Among them, 34 were selected according to their dust envelope class (as suggested by Sloan, Little-Marenin & Price, 199…
Field spectrum and degrees of freedom in AdS/CFT correspondence and Randall Sundrum model
Henrique Boschi-Filho, Nelson R. F. Braga
Compactified AdS space can not be mapped into just one Poincare coordinate chart. This implies that the bulk field spectrum is discrete despite the infinite range of the coordinate…
Scaling Violations in the Logarithmic Derivative of
E. Gotsman, E. Ferreira, E. Levin +2
We examine the latest HERA experimental measurements of the logarithmic derivative of the proton structure function. We analyze the characteristics of DGLAP with and without…