49 citations · 280 across the 33 of their papers we have counts for
34 papers
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 Telegraph Noise based True Random Number Generator for Fully Integrated Systems
Gilson Wirth, Pedro A B Alves, Roberto da Silva
Generating streams of true random numbers is a critical component of many embedded systems. The design of fully integrated, area and power efficient True Random Number Generators i…
Lattice Gas model to describe a nightclub dynamics
Eduardo Velasco Stock, Roberto da Silva
In this work, we propose a simple stochastic agent-based model to describe the revenue dynamics of a nightclub venue based on the relationship between profit and spatial occupation…
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…
The 7% Rule: A Maximum Entropy Prediction on New Decays of the Higgs Boson
Alexandre Alves, Alex Gomes Dias, Roberto da Silva
The entropy of the Higgs boson decay probabilities distribution in the Standard Model (SM) is maximized for a Higgs mass value that is less than one standard deviation away from th…
Metastability on the steady states in a Fermi-like model of counterflowing particles
E. V. Stock, R. da Silva
In this work we propose a two-dimensional extension of a previously defined one-dimensional version of a model of counterflowing particles, which considers an adapted Fermi-Dirac d…
A simple study of the correlation effects in the superposition of waves of electric fields: the emergence of extreme events
Roberto da Silva, Sandra D. Prado
In this paper, we study the effects of correlated random phases in the intensity of a superposition of wave-fields. Our results suggest that regardless of whether the phase dis…
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…
Spatial patterns of random walkers under evolution of the attractiveness: persistent nodes, degree distribution, and spectral properties
Roberto da Silva
In this paper we explore the features of a graph generated by random walkers with nodes that have evolutionary attractiveness and Boltzmann-like transition probabilities that depen…
Statistics, distillation, and ordering emergence in a two-dimensional stochastic model of particles in counterflowing streams
Eduardo Velasco Stock, Roberto da Silva, Henrique Almeida Fernandes
In this paper, we proposed a stochastic model which describes two species of particles moving in counterflow. The model generalizes the theoretical framework describing the transpo…
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…
Towards Rock-paper-scissors patterns in the Optional Public Goods Game under random mobility
Pablo A. Valverde, Roberto da Silva, Eduardo V. Stock
Social dilemmas concern a natural conflict between cooperation and self interests among individuals in large populations. The emergence of cooperation and its maintenance is the ke…
A new look on the stabilization of inverted pendulum with parametric excitation and large random frequencies: analytical and numerical approaches
Roberto da Silva, Sandra D. Prado, Henrique A. Fernandes
In this paper we explore the stability of an inverted pendulum with generalized parametric excitation described by a superposition of sines with different frequencies and phase…
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…