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Autor Tarancón, A. |
Documentos disponibles escritos por este autor (23)
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Alonso, J. L. ; Cruz, A. ; Fernández Pérez, Luis Antonio ; Jiménez, S. ; Martín Mayor, Víctor ; Ruiz-Lorenzo, J. J. ; Tarancón, A. | American Physical Society | 2005-01-14The phase diagram of the simplest approximation to double-exchange systems, the bosonic double-exchange model with antiferromagnetic (AFM) superexchange coupling, is fully worked out by means of Monte Carlo simulations, large-N expansions, and v[...]![]()
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Fernández Pérez, Luis Antonio ; Martín Mayor, Víctor ; Pérez Gaviro, S. ; Tarancón, A. ; Young, A. P. | American Physical Society | 2009-07-22We 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 compatible with the most economical scenario: a[...]![]()
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Antonelli, S. ; Bellacci, M. ; Fernández Pérez, Luis Antonio ; Muñoz Sudupe, Antonio ; Ruiz Lorenzo, J. J. ; Sarno, R. ; Tarancón, A. ; Bartoloni, A. ; Battista, C. ; Cabibbo, N. ; Cabasino, S. ; Panizzi, E. ; Paolucci, P. S. ; Todeesco, G. M. ; Torelli, M. ; Tripiccione, R. ; Vicini, P. | Elsevier Science BV | 1995-02-02Polyakov type loops are responsible for the difference between quenched and unquenched finite size effects on the QCD mass spectrum. With a numerical simulation, using appropriate sea quark spatial boundary conditions, we show that we can align [...]![]()
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Fernández Pérez, Luis Antonio ; Muñoz Sudupe, Antonio ; Ruiz Lorenzo, J. J. ; Tarancón, A. | Elsevier Science BV | 1995-04We propose a family of renormalization group transformations characterized by free parameters that may be tuned in order to reduce the truncation effects. As a check we test them in the three dimensional XY model. The Schwinger-Dyson equations a[...]![]()
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Campos, I. ; Cotallo-Abán, M. ; Martín Mayor, Víctor ; Pérez Gaviro, S. ; Tarancón, A. | American Physical Society | 2006-11-24It is shown, by means of Monte Carlo simulation and finite size scaling analysis, that the Heisenberg spin glass undergoes a finite-temperature phase transition in three dimensions. There is a single critical temperature, at which both a spin gl[...]![]()
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Cruz, A. ; Íñiguez, D. ; Fernández Pérez, Luis Antonio ; Muñoz Sudupe, Antonio ; Tarancón, A. | Elsevier Science BV | 1998-01-01The order of the Coulomb-Higgs transition in the U (1) -Higgs model with unfrozen modulus of the scalar field is studied. Large lattices (up to 24^4 in one case) and high statistics are used. We fix ? = 1.15 and explore specially a region of ?[...]![]()
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Cruz, A. ; Íñiguez, D. ; Tarancón, A. ; Fernández Pérez, Luis Antonio ; Muñoz Sudupe, Antonio | Elsevier Science BV | 1995-04We find a first order Coulomb-Higgs phase transition at moderately large values of the coupling ?, and no evidence for a change of order at any finite value of it.![]()
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Maiorano, A. ; Martín Mayor, Víctor ; Ruiz Lorenzo, J. J. ; Tarancón, A. | American Physical Society | 2007-08-31We perform intensive numerical simulations of the three-dimensional site-diluted Ising antiferromagnet in a magnetic field at high values of the external applied field. Even if data for small lattice sizes are compatible with second-order critic[...]