Measures of critical exponents in the four-dimensional site percolation
- H. G. Ballesteros, L. A. Fernández, V. Martin-Mayor, A. M. Sudupe, G. Parisi, J. Ruiz-Lorenzo
- Physics
- 20 December 1996
Critical exponents of the three dimensional diluted Ising model
- H. G. Ballesteros, L. A. Fernández, V. Martin-Mayor, A. M. Sudupe, G. Parisi, J. Ruiz-Lorenzo
- Physics
- 25 February 1998
We study the phase diagram of the site-diluted Ising model in a wide dilution range, through Monte Carlo simulations and finite-size scaling techniques. Our results for the critical exponents and…
Ion kinetic transport in the presence of collisions and electric field in TJ-II ECRH plasmas
- F. Castejón, L. A. Fernández, J. Guasp, V. Martin-Mayor, A. Tarancón, J. Velasco
- Physics
- 27 April 2007
The ion collisional transport is estimated for the TJ-II device without the assumption of radially narrow particle trajectories, which is usually made in neoclassical transport studies. One million…
Equilibrium fluid-solid coexistence of hard spheres.
- L. A. Fernández, V. Martin-Mayor, B. Seoane, P. Verrocchio
- ChemistryPhysical Review Letters
- 14 March 2011
We present a tethered Monte Carlo simulation of the crystallization of hard spheres. Our method boosts the traditional umbrella sampling to the point of making practical the study of constrained…
Janus: An FPGA-Based System for High-Performance Scientific Computing
- F. Belletti, M. Cotallo, J. Velasco
- Computer ScienceComputing in science & engineering (Print)
- 18 October 2007
The authors discuss this configurable system's architecture and focus on its use for Monte Carlo simulations of statistical mechanics, as Janus performs impressively on this class of application.
Phase transition in the three dimensional Heisenberg spin glass: Finite-size scaling analysis
- L. A. Fernández, V. Martin-Mayor, S. Perez-Gaviro, A. Tarancón, A. Young
- Physics
- 4 May 2009
We have investigated the phase transition in the Heisenberg spin glass using massive numerical simulations to study very large sizes, 483. A finite-size scaling analysis indicates that the data are…
Critical behavior in the site-diluted three-dimensional three-state Potts model
- H. G. Ballesteros, L. A. Fernández, V. Martin-Mayor, A. M. Sudupe, G. Parisi, J. Ruiz-Lorenzo
- Physics
- 1 February 2000
We have studied numerically the effect of quenched site dilution on a weak first-order phase transition in three dimensions. We have simulated the site diluted three-states Potts model studying in…
IANUS: scientific computing on an FPGA-based architecture
- F. Belletti, M. Cotallo, J. Velasco
- Computer ScienceInternational Conference on Parallel Computing
- 11 November 2006
This poster describes the architecture, the implementation and the methodology with which a specific application is mapped onto the system, a massively parallel system based on a 2D array of FPGA-based processors with nearest-neighbor connections.
Kinetic simulations of fast ions in stellarators
- A. Bustos, F. Castejón, J. Fontdecaba
- Physics
- 28 July 2011
The steady-state distribution function of neutral beam injection (NBI) fast ions is calculated numerically for the LHD and TJ-II stellarators using the code ISDEP (Integrator of Stochastic…
Nonequilibrium spin glass dynamics with Janus
- F. Belletti, A. Cruz, D. Yllanes
- Physics
- 30 January 2009
The out of equilibrium evolution for an Edwards‐Anderson spin glass is followed for a tenth of a second, a long enough time to let us make safe predictions about the behaviour at experimental scales.…
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