107 citations · 389 across the 13 of their papers we have counts for
9 papers · 1 filter
Geometry of rare regions behind Griffiths singularities in random quantum magnets
István A. Kovács, Ferenc Iglói
In many-body systems with quenched disorder, dynamical observables can be singular not only at the critical point, but in an extended region of the paramagnetic phase as well. Thes…
Long-range epidemic spreading in a random environment
R. Juhász, I. A. Kovács, F. Iglói
Modeling long-range epidemic spreading in a random environment, we consider a quenched disordered, -dimensional contact process with infection rates decaying with the distance a…
Excess entropy and central charge of the two-dimensional random-bond Potts model in the large-Q limit
István A. Kovács, Jean-Christian Anglès d'Auriac, Ferenc Iglói
We consider the random-bond Potts model in the large- limit and calculate the excess entropy, , of a contour, , which is given by the mean number of Fortuin-Kasteleyn cl…
Infinite randomness critical behavior of the contact process on networks with long-range connections
R. Juhász, I. A. Kovács
The contact process and the slightly different susceptible-infected-susceptible model are studied on long-range connected networks in the presence of random transition rates by mea…
Renormalization group study of random quantum magnets
István A. Kovács, Ferenc Iglói
We have developed a very efficient numerical algorithm of the strong disorder renormalization group method to study the critical behaviour of the random transverse-field Ising mode…
Infinite disorder scaling of random quantum magnets in three and higher dimensions
Istvan A. Kovacs, Ferenc Igloi
Using a very efficient numerical algorithm of the strong disorder renormalization group method we have extended the investigations about the critical behavior of the random transve…
Renormalization group study of the two-dimensional random transverse-field Ising model
Istvan A. Kovacs, Ferenc Igloi
The infinite disorder fixed point of the random transverse-field Ising model is expected to control the critical behavior of a large class of random quantum and stochastic systems…
Critical behavior and entanglement of the random transverse-field Ising model between one and two dimensions
Istvan A. Kovacs, Ferenc Igloi
We consider disordered ladders of the transverse-field Ising model and study their critical properties and entanglement entropy for varying width, , by numerical applicat…
The Random-bond Potts model in the large-q limit
Robert Juhasz, Heiko Rieger, Ferenc Igloi
We study the critical behavior of the q-state Potts model with random ferromagnetic couplings. Working with the cluster representation the partition sum of the model in the large-q…