4 papers
Barrier crossing in a two-state system: Effect of bias and stochastic fields
Sara Oliver-Bonafoux, Raúl Toral, Amitabha Chakrabarti
We study barrier crossing in a two-state system, namely the kinetic Ising model, in the presence of a weak bias field and spatially homogeneous, but time-dependent, Gaussian random…
Numerical methods for quasi-stationary distributions
Sara Oliver-Bonafoux, Javier Aguilar, Tobias Galla +1
In stochastic processes with absorbing states, the quasi-stationary distribution provides valuable insights into the long-term behaviour prior to absorption. In this work, we revis…
Stochastic field effects in a two-state system: symmetry breaking and symmetry restoring
Sara Oliver-Bonafoux, Raul Toral, Amitabha Chakrabarti
We study the Ising model under a time-varying, but spatially homogeneous, Gaussian random magnetic field. In the Monte Carlo simulations, we go beyond the standard analysis of the…
Complete aging in the noisy voter model enhances consensus formation
Jaume Llabrés, Sara Oliver-Bonafoux, Celia Anteneodo +1
We investigate the effects of aging in the noisy voter model considering that the probability to change states decays algebraically with age , defined as the time elapsed since…