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Strong-disorder paramagnetic-ferromagnetic fixed point in the square-lattice +- J Ising model
F. Parisen Toldin, A. Pelissetto, E. Vicari
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 in…
Critical and multicritical behavior of the +- J Ising model in two and three dimensions
Martin Hasenbusch, Francesco Parisen Toldin, Andrea Pelissetto +1
We report our Monte Carlo results on the critical and multicritical behavior of the +- J Ising model [with a random-exchange probability P(J_{xy}) = p δ(J_{xy} - J) + (1-p) δ(J_{xy…
Large N transition in the 2D SU(N)xSU(N) nonlinear sigma model
Rajamani Narayanan, Herbert Neuberger, Ettore Vicari
We consider the characteristic polynomial associated with the smoothed two point function in two dimensional large N principal chiral model. We numerically show that it undergoes a…
The critical behavior of three-dimensional Ising spin glass models
Martin Hasenbusch, Andrea Pelissetto, Ettore Vicari
We perform high-statistics Monte Carlo simulations of three-dimensional Ising spin-glass models on cubic lattices of size L: the +- J (Edwards-Anderson) Ising model for two values…
Universal dependence on disorder of 2D randomly diluted and random-bond +-J Ising models
M. Hasenbusch, F. Parisen Toldin, A. Pelissetto +1
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…
A large N phase transition in the continuum two dimensional SU(N) X SU(N) principal chiral model
R. Narayanan, H. Neuberger, E. Vicari
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 dista…
Multicritical Nishimori point in the phase diagram of the +- J Ising model on a square lattice
Martin Hasenbusch, Francesco Parisen Toldin, Andrea Pelissetto +1
We investigate the critical behavior of the random-bond +- J Ising model on a square lattice at the multicritical Nishimori point in the T-p phase diagram, where T is the temperatu…
Theta dependence of SU(N) gauge theories in the presence of a topological term
Ettore Vicari, Haralambos Panagopoulos
We review results concerning the theta dependence of 4D SU(N) gauge theories and QCD, where theta is the coefficient of the CP-violating topological term in the Lagrangian. In part…
Nodal quasiparticles and the onset of spin density wave order in the cuprates
Andrea Pelissetto, Subir Sachdev, Ettore Vicari
We present a theory for the onset of spin density wave order in the superconducting ground state of the cuprates. We compute the scaling dimensions of allowed perturbations of a `r…