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Fernández Pérez, Luis Antonio ; Marinari, E. ; Martín Mayor, Víctor ; Parisi, V. ; Ruiz Lorenzo, J. J. | IOP publishing ltd | 2019-05-31Recent high precision experimental results on spin-glass films ask for a detailed understanding of the domain-growth dynamics of two-dimensional spin glasses. To achieve this goal, we numerically simulate the out-equilibrium dynamics of the Isin[...]texto impreso
Antonelli, S. ; Bartoloni, A. ; Battista, C. ; Bellacci, M. ; Cabasino, S. ; Cabibbo, N. ; Fernández Pérez, Luis Antonio ; Panizzi, E. ; Paolucci, P. S. ; Muñoz Sudupe, Antonio ; Ruiz Lorenzo, J. J. ; Sarno, R. ; Tarancón, A. ; Todesco, G. M. ; Torelli, M. ; Vinici, P. | Elsevier Science BV | 1995-04We present numerical results obtained in full QCD with 2 flavors of Wilson fermions. We discuss the relation between the phase of Polyakov loops and the sea quarks boundary conditions. We report prefiminary results about the HMC autocorrelation [...]texto impreso
Ballesteros, H. G. ; Fernández Pérez, Luis Antonio ; Martín Mayor, Víctor ; Muñoz Sudupe, Antonio ; Parisi, G. ; Ruiz Lorenzo, J. J. | American Physical Society | 2000-02-01We 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 detail the secondorder region of its phase diagr[...]texto impreso
Ballesteros, H. G. ; Cruz, A. ; Fernández Pérez, Luis Antonio ; Martín Mayor, Víctor ; Pech, J. ; Ruiz Lorenzo, J. J. ; Tarancón, A. ; Téllez, P. ; Ullod, C. L. ; Ungil, C. | American Physical Society | 2000-12-01We have simulated, using parallel tempering, the three-dimensional Ising spin glass model with binary couplings in a helicoidal geometry. The largest lattice (L520) has been studied using a dedicated computer (the SUE machine). We have obtained,[...]texto impreso
Fernández Pérez, Luis Antonio ; Marinari, E. ; Martín Mayor, Víctor ; Paga, I ; Ruiz Lorenzo, J. J. | American Physical Society | 2019-11-11Motivated by recent experiments of exceptional accuracy, we study numerically the spin-glass dynamics in a film geometry. We cover all the relevant time regimes, from picoseconds to equilibrium, at temperatures at and below the 3D critical point[...]texto impreso
Billoire, A. ; Fernández Pérez, Luis Antonio ; Maiorano, A. ; Martín Mayor, Víctor ; Moreno Gordo, J. ; Parisi, G. ; Ricci-Tersenghi, F. ; Ruiz Lorenzo, J. J. | IOP Publishing | 2018-03-02We have introduced a variational method to improve the computation of integrated correlation times in the Parallel Tempering Dynamics, obtaining a better estimate (a lower bound, at least) of the exponential correlation time. Using this determin[...]texto impreso
Billoire, A. ; Fernández Pérez, Luis Antonio ; Maiorano, A. ; Marinari, E. ; Martín Mayor, Víctor ; Moreno Gordo, J. ; Parisi, G. ; Ricci-Tersenghi, F. ; Ruiz Lorenzo, J. J. | IOP Publishing | 2018-03-02We have introduced a variational method to improve the computation of integrated correlation times in the Parallel Tempering Dynamics, obtaining a better estimate (a lower bound, at least) of the exponential correlation time. Using this determin[...]texto impreso
Carmona, J. M. ; Cruz, A. ; Fernández Pérez, Luis Antonio ; Jiménez, S. ; Martín Mayor, Víctor ; Muñoz Sudupe, Antonio ; Pech, J. ; Ruiz Lorenzo, J. J. ; Tarancón, A. ; Téllez, P. | Elsevier Science BV | 2003-05-08It is shown that a bosonic formulation of the double-exchange model, one of the classical models for magnetism, generates dynamically a gauge-invariant phase in a finite region of the phase diagram. We use analytical methods, Monte Carlo simulat[...]texto impreso
Fernández Pérez, Luis Antonio ; Gordillo Guerrero, A. ; Martín Mayor, Víctor ; Ruiz Lorenzo, J. J. | American Institute of Physics | 2008We present a detailed numerical study on the effects of adding quenched impurities to a three dimensional system which in the pure case undergoes a strong first order phase transition (specifically, the ferromagnetic/paramagnetic transition of t[...]texto impreso
Fernández Pérez, Luis Antonio ; Gordillo Guerrero, A. ; Martín Mayor, Víctor ; Ruiz Lorenzo, J. J. | American Physical Society | 2008-02-08We present the first detailed numerical study in three dimensions of a first-order phase transition that remains first order in the presence of quenched disorder (specifically, the ferromagnetic-paramagnetic transition of the site-diluted four s[...]texto impreso
García Pérez, M. ; González Arroyo, A. ; Martínez, P. ; Fernández Pérez, Luis Antonio ; Muñoz Sudupe, Antonio ; Ruiz Lorenzo, J. J. ; Azcoiti, V. ; Campos, I. ; Ciria, J.C. ; Cruz, A. ; Íñiguez, D. ; Lesmes, F. ; Badoni, D. ; Pech, J. | Elsevier Science BV | 1993-05-20We study SU(2) lattice gauge theory in small volumes and with twist m ? = (1, 1, 1). We investigate the presence of the periodic instantons of Q = 1/2 and determine their free energy and their contribution to the splitting of energy flux sectors[...]texto impreso
Ballesteros, H. G. ; Fernández Pérez, Luis Antonio ; Martín Mayor, Víctor ; Muñoz Sudupe, Antonio ; Parisi, G. ; Ruiz Lorenzo, J. J. | IOP publishing ltd | 1997-12-21We study the site-diluted Ising model in two dimensions with Monte Carlo simulations. Using finite-size scaling techniques we compute the critical exponents observing deviations from the pure Ising ones. The differences can be explained as the e[...]texto impreso
Ballesteros, H. G. ; Fernández Pérez, Luis Antonio ; Martín Mayor, Víctor ; Muñoz Sudupe, Antonio ; Parisi, G. ; Ruiz Lorenzo, J. J. | Elsevier Science BV | 1997-05-15Using finite-size scaling methods we measure the thermal and magnetic exponents of the site percolation in four dimensions, obtaining a value for the anomalous dimension very different from the results found in the literature. We also obtain the[...]texto impreso
Ballesteros, H.G. ; Fernández Pérez, Luis Antonio ; Martín Mayor, Víctor ; Muñoz Sudupe, Antonio ; Parisi, G. ; Ruiz Lorenzo, J. J. | Elsevier Science BV | 1997-05-15Using finite-size scaling methods we measure the thermal and magnetic exponents of the site percolation in four dimensions, obtaining a value for the anomalous dimension very different from the results found in the literature. We also obtain the[...]texto impreso
Fernández Pérez, Luis Antonio ; Gordillo Guerrero, A. ; Martín Mayor, Víctor ; Ruiz Lorenzo, J. J. | American Physical Society | 2009-11-06A microcanonical finite-size ansatz in terms of quantities measurable in a finite lattice allows extending phenomenological renormalization the so-called quotients method to the microcanonical ensemble. The ansatz is tested numerically in two m[...]
