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Alonso, J. L. ; Ballesteros, H.G. ; Campos, I. ; Carmona, J. M. ; Clemente Gallardo, J. ; Fernández Pérez, Luis Antonio ; Íñiguez, D. ; Martín Mayor, Víctor ; Muñoz Sudupe, Antonio ; Tarancón, A. ; Ullod, C. L. | Elsevier | 1997-02We present antiferromagnetism as a mechanism capable of modifying substantially the phase diagram and the critical behaviour of statistical mechanical models. This is particularly relevant in four dimensions, due to the connection between second[...]texto impreso
Ballesteros, H.G. ; Fernández Pérez, Luis Antonio ; Martín Mayor, Víctor ; Muñoz Sudupe, Antonio ; Parisi, G. ; Ruiz-Lorenzo, J. J. | Elsevier Science BV | 1998-04We study the four dimensional site-diluted Ising model using finite-size scaling techniques. We explore the whole parameter space (density-coupling) in order to determine the Universality Class of the transition line. Our data are compatible wit[...]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. | IOP publishing ltd | 1999-01-08Using Finite-Size Scaling techniques we obtain accurate results for critical quantities of the Ising model and the site percolation, in three dimensions. We pay special attention in parameterizing the corrections-to-scaling, what is necessary to[...]texto impreso
We use a set of Schwinger-Dyson equations for the Ising model to check several random number generators. For the model in two and three dimensions, it is shown that the equations are sensitive tests of bias originating with the random numbers. T[...]
