49 citations · 280 across the 33 of their papers we have counts for
21 papers · 1 filter
Phase Transitions and Order Parameters in Correlation Matrices: A Wishart-Ensemble Perspective on the Largest Eigenvalue
Roberto da Silva, Antonio Mihara, Henrique Tramontina +1
We investigate the properties of the largest eigenvalue of correlation matrices within the framework of Wishart ensembles. In this work, we propose the largest eigenvalue as an eff…
Crossover effects on the phase transitions phenomena translated by arborecences and spectral properties
Roberto da Silva
This study investigates how visibility graphs constructed from Monte Carlo Markov Chain time series of spin models capture the critical behavior of the system. More precisely, we s…
Phase Diagrams of the YK Surface-Reaction Model on 2D lattices with Exchange Diffusion
Henrique A. Fernandes, Roberto da Silva, Paulo F. Gomes
In this work, we investigate the phase diagrams of the Yaldram and Khan catalytic surface model on square and hexagonal lattices when exchange diffusion is allowed for carbon monox…
Topology induced modifications in the critical behavior of the Yaldram Khan catalytic reaction model
Paulo F. Gomes, Henrique A. Fernandes, Roberto da Silva
In this work, we investigated how the use of complex networks as catalytic surfaces can affect the phase diagram of the Yaldram-Khan model, as well as how the order of the phase tr…
Unveiling the hidden weak universality of the ZGB model
Henrique Almeida Fernandes, Roberto da Silva
In this work, we revisited the Ziff-Gullari-Barshad (ZGB) model in order to investigate its critical behavior when carbon monoxide (CO) molecules are allowed to desorb from the cat…
Mean-field criticality explained by random matrices theory
Roberto da Silva, Heitor C. Fernandes, Eliseu Venites Filho +2
How a system initially at infinite temperature responds when suddenly placed at finite temperatures is a way to check the existence of phase transitions. It has been shown in [R. d…
Random matrices theory elucidates the critical nonequilibrium phenomena
Roberto da Silva
The earlier times of evolution of a magnetic system contain more information than we can imagine. Capturing correlation matrices G of different time evolutions of a simple testbed…
First numerical evidence of Janssen-Oerding's prediction in a three-dimensional spin model far from equilibrium
Roberto da Silva
Jansen and Oerding [H. K. Janssen, K. Oerding, J. Phys. A: Math. Gen. 27, 715 (1994)] predicted an interesting anomalous tricritical dynamic behavior in three-dimensional models vi…
Affinities and disagreements between Mean-field and short-range critical dynamics
Roberto da Silva
In this work, we explore some interesting details of the time-dependent regime of the long-range systems under mean-field approximation in comparison with the critical dynamics of…
Analysis of the earlier times and flux of the entropy on the majority voter model with difusion
Roberto da Silva, Mario J. de Oliveira, Tânia Tomé +1
We study the properties of nonequilibrium systems modelled as spin models without defined Hamiltonian as the majority voter model. This model has transition probabilities that do n…
Investigating the nonequilibrium aspects of long-range Potts model: refinement of critical temperatures and raw exponents
Roberto da Silva, J. R. Drugowich de Felicio, Henrique A. Fernandes
In this work, we analyse the state Potts model with long-range interactions through nonequilibrium scaling relations commonly used when studying short-range systems. We determi…
Mobile-clogging transition in a Fermi-like model of counterflowing particles
Roberto da Silva, Eduardo V. Stock
In this paper we propose a generalized model for the motion of a two-species self-driven objects ranging from a scenario of a completely random environment of particles of negligib…
When and how much the altruism impacts your privileged information? Proposing a new paradigm in game theory: The boxers game
Roberto da Silva, Henrique A. Fernandes
In this work, we proposed a new -person game in which the players can bet on two options, for example represented by two boxers. Some of the players have privileged information…
Time-dependent Monte Carlo simulations of the critical and Lifshitz points of the ANNNI model
Roberto da Silva, Nelson Alves, J. R. Drugowich de Felício
In this work, we study the critical behavior of second order points and specifically of the Lifshitz point (LP) of a three-dimensional Ising model with axial competing interactions…
An alternative method to characterize first- and second-order phase transitions in surface reaction models
Henrique A. Fernandes, Roberto da Silva, Eder D. Santos +2
In this work, we revisited the Ziff-Gulari-Barshad (ZGB) model to study its phase transitions and critical exponents through time-dependent Monte Carlo simulations. We used a metho…
Novel considerations about the non-equilibrium regime of the tricritical point in a metamagnetic model: localization and tricritical exponents
Roberto da Silva, Henrique Almeida Fernandes, José Roberto Drugowich de Felício +1
We have investigated the time-dependent regime of a two-dimensional metamagnetic model at its tricritical point via Monte Carlo simulations. First of all, we obtained the temperatu…
Nonequilibrium scaling explorations on a 2D Z(5)-symmetric model
Roberto da Silva, Henrique A. Fernandes, J. R. Drugowich de Felicio
We have investigated the dynamic critical behavior of the two-dimensional Z(5)-symmetric spin model by using short-time Monte Carlo (MC) simulations. We have obtained estimates of…
Stochastic model of self-driven two-species objects in the context of the pedestrian dynamics
Roberto da Silva, Agenor Hentz, Alexandre Alves
In this work we propose a model to describe the statistical fluctuations of the self-driven objects (species A) walking against an opposite crowd (species B) in order to simulate t…
Generalized Metropolis dynamics with a generalized master equation: An approach for time-independent and time-dependent Monte Carlo simulations of generalized spin systems
Roberto da Silva, Jose Roberto Drugowich de Felicio, Alexandre Souto Martinez
The extension of Boltzmann-Gibbs thermostatistics, proposed by Tsallis, introduces an additional parameter to the inverse temperature . Here, we show that a previously intro…
A novel and precise time domain description of MOSFET low frequency noise due to random telegraph signals
Roberto da Silva, Gilson Wirth, Lucas Brusamarello
Nowadays, random telegraph signals play an important role in integrated circuit performance variability, leading for instance to failures in memory circuits. This problem is relate…
Revisiting the critical behavior of nonequilibrium models in Short-time Monte Carlo Simulations
Roberto da Silva, Ronald Dickman, J. R. Drugowich de Felicio
We analyze two alternative methods for determining the exponent of the contact process (CP) and Domany-Kinzel (DK) cellular automaton in Monte Carlo Simulations. One method emp…