51 citations · 164 across the 9 of their papers we have counts for
9 papers
Quantum Potts chain in alternating field
Péter Lajkó. Wedade Alaaeldin Ahmed Shafik Yehia, Ferenc Iglói
The -state Potts chain with ferromagnetic couplings, , in the presence of a transverse field, , has a quantum phase transition at , which is continuous for $q \le…
Random Ising chain in transverse and longitudinal fields: Strong disorder RG study
Tamás Pető, Ferenc Iglói, István A. Kovács
Motivated by the compound , we consider the Ising chain with random couplings and in the presence of simultaneous random transverse and longitud…
Griffiths-McCoy singularities in random quantum spin chains: Exact results
Ferenc Iglói, István A. Kovács
We consider random quantum (tight-binding, XX and Ising) spin chains in the off-critical region and study their Griffiths-McCoy singularities. These are obtained from the density o…
Disorder induced cross-over effects at quantum critical points
Enrico Carlon, Péter Lajko, Ferenc Iglói
Critical properties of quantum spin chains with varying degrees of disorder are studied at zero temperature by analytical and extensive density matrix renormalization methods. Gene…
Griffiths-McCoy singularities in random quantum spin chains: Exact results through renormalization
Ferenc Igloi, Robert Juhasz, Peter Lajko
The Ma-Dasgupta-Hu renormalization group (RG) scheme is used to study singular quantities in the Griffiths phase of random quantum spin chains. For the random transverse-field Isin…
Interfacial adsorption in two-dimensional Potts models
E. Carlon, F. Igloi, W. Selke +1
The interfacial adsorption W at the first-order transition in two-dimensional q-state Potts models is studied. In particular, findings of Monte Carlo simulations and of density-mat…
Boundary critical behaviour of two-dimensional random Ising models
F. Igloi, P. Lajko, W. Selke +1
Using Monte Carlo techniques and a star-triangle transformation, Ising models with random, 'strong' and 'weak', nearest-neighbour ferromagnetic couplings on a square lattice with a…
Density Profiles, Casimir Amplitudes and Critical Exponents in the Two Dimensional Potts Model: A Density Matrix Renormalization Study
Enrico Carlon, Ferenc Igloi
We use the density matrix renormalization group (DMRG) to perform a detailed study of the critical properties of the two dimensional Q state Potts model, including the magnetizatio…
Critical Behavior of Hierarchical Ising Models
Ferenc Igloi, Peter Lajko, Ferenc Szalma
We consider the critical behavior of two-dimensional layered Ising models where the exchange couplings between neighboring layers follow hierarchical sequences. The perturbation ca…