Gabriel Pérez
International Centre for Theoretical Physics
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Publication
Featured researches published by Gabriel Pérez.
Physica D: Nonlinear Phenomena | 1993
Gabriel Pérez; Sudeshna Sinha; Hilda A. Cerdeira
Abstract The broad peaks seen in the power spectra of the mean field in a globally coupled map system indicate a subtle coherence between the elements, even in the “turbulent” phase. These peaks are investigated in detail with respect to the number of elements coupled, nonlinearity and global coupling strengths. We find that this roughly periodic behavior also appears in the probability distribution of the mapping, which is therefore not invariant. We also find that these peaks are determined by two distinct components: effective renormalization of the nonlinearity parameter in the local mappings, and the strength of the mean field interaction term. Finally, we demonstrate the influence of background noise on the peaks, which is quite counterintuitive, as they become sharper with increase in strength of the noise, up to a certain critical noise strength.
Stochastics and Dynamics | 2004
Manuel Rodríguez-Achach; Gabriel Pérez; Hilda A. Cerdeira
The effects of quantum and thermal corrections on the dynamics of a damped nonlinearly kicked harmonic oscillator are studied. This is done via the Quantum Langevin Equation formalism working on a truncated moment expansion of the density matrix of the system. We find that the type of bifurcations present in the system change upon quantization and that chaotic behavior appears for values of the nonlinear parameter that are far below the chaotic threshold for the classical model. Upon increase of temperature or Plancks constant, bifurcation points and chaotic thresholds are shifted towards lower values of the nonlinear parameter. There is also an anomalous reverse behavior for low values of the cutoff frequency.
Physical Review E | 1994
Gabriel Pérez; Hilda A. Cerdeira
Physical Review A | 1992
Gabriel Pérez; Hilda A. Cerdeira
Physical Review E | 1993
Bruno Crespi; Gabriel Pérez; Shau-Jin Chang
Physical Review A | 1992
Gabriel Pérez; Carlos Pando-Lambruschini; Sudeshna Sinha; Hilda A. Cerdeira
Physical Review E | 2001
Francisco Sastre; Gabriel Pérez
Physical Review E | 1996
Gabriel Pérez; Sudeshna Sinha; Hilda A. Cerdeira
EPL | 1991
Gabriel Pérez; Sudeshna Sinha; Hilda A. Cerdeira
Physical Review A | 1990
Shau-Jin Chang; Gabriel Pérez