Zobrazeno 1 - 10
of 1 392
pro vyhledávání: '"Vicari, E."'
Publikováno v:
Phys. Rev. B 88 (2013) 024517
We study the universal critical behavior of two-dimensional (2D) lattice bosonic gases at the Berezinskii-Kosterlitz-Thouless (BKT) transition, which separates the low-temperature superfluid phase from the high-temperature normal phase. For this purp
Externí odkaz:
http://arxiv.org/abs/1306.2510
Publikováno v:
J. Stat. Phys. 135 (2009), 1039
We consider the random-bond +- J Ising model on a square lattice as a function of the temperature T and of the disorder parameter p (p=1 corresponds to the pure Ising model). We investigate the critical behavior along the paramagnetic-ferromagnetic t
Externí odkaz:
http://arxiv.org/abs/0811.2101
Publikováno v:
Phys. Rev. E 78 (2008) 011110
We consider the two-dimensional randomly site diluted Ising model and the random-bond +-J Ising model (also called Edwards-Anderson model), and study their critical behavior at the paramagnetic-ferromagnetic transition. The critical behavior of therm
Externí odkaz:
http://arxiv.org/abs/0804.2788
Publikováno v:
JHEP0804:094,2008
It is established by numerical means that the continuum large N principal chiral model in two dimensions has a phase transition in a smoothed two point function at a critical distance of the order of the correlation length.
Comment: 15 pages, 6
Comment: 15 pages, 6
Externí odkaz:
http://arxiv.org/abs/0803.3833
Publikováno v:
J. Stat. Mech. L02001 (2008)
We perform high-statistics Monte Carlo simulations of three three-dimensional Ising spin-glass models: the +-J Ising model for two values of the disorder parameter p, p=1/2 and p=0.7, and the bond-diluted +-J model for bond-occupation probability p_b
Externí odkaz:
http://arxiv.org/abs/0710.1980
Publikováno v:
Phys. Rev. B 76 (2007), 184202
We consider the three-dimensional $\pm J$ model defined on a simple cubic lattice and study its behavior close to the multicritical Nishimori point where the paramagnetic-ferromagnetic, the paramagnetic-glassy, and the ferromagnetic-glassy transition
Externí odkaz:
http://arxiv.org/abs/0707.2866
We study the spectrum of confining strings in SU(3) pure gauge theory, in different representations of the gauge group. Our results provide direct evidence that the string spectrum agrees with predictions based on n-ality. We also investigate the lar
Externí odkaz:
http://arxiv.org/abs/hep-th/0409203
Publikováno v:
Phys.Rev. E68 (2003) 036136
We perform a high-statistics simulation of the three-dimensional randomly dilute Ising model on cubic lattices $L^3$ with $L\le 256$. We choose a particular value of the density, x=0.8, for which the leading scaling corrections are suppressed. We det
Externí odkaz:
http://arxiv.org/abs/cond-mat/0306272
Publikováno v:
Phys.Rev. B68 (2003) 134418
We determine the critical equation of state of three-dimensional randomly dilute Ising systems, i.e. of the random-exchange Ising universality class. We first consider the small-magnetization expansion of the Helmholtz free energy in the high-tempera
Externí odkaz:
http://arxiv.org/abs/cond-mat/0305434
Publikováno v:
Phys.Rev. E68 (2003) 016110
We compute the dynamic structure factor for the Ising model with a purely relaxational dynamics (model A). We perform a perturbative calculation in the $\epsilon$ expansion, at two loops in the high-temperature phase and at one loop in the temperatur
Externí odkaz:
http://arxiv.org/abs/cond-mat/0301588