51 citations · 248 across the 20 of their papers we have counts for
22 papers
Slow activity decay in excitable models with discontinuous phase transitions
Paulo H. Lorenzoni, Géza Ódor, Silvio C. Ferreira +1
As a simple model of interacting systems of excitable degrees of freedom, we consider a threshold contact process on various lattices and networks, in which a successful activation…
Corrections to the singlet-length distribution and the entanglement entropy in random singlet phases
Róbert Juhász
We consider random singlet phases of spin-, random, antiferromagnetic spin chains, in which the universal leading-order divergence of the aver…
Emergence of disconnected clusters in heterogeneous complex systems
István A. Kovács, Róbert Juhász
Percolation theory dictates an intuitive picture depicting correlated regions in complex systems as densely connected clusters. While this picture might be adequate at small scales…
Persistence discontinuity in disordered contact processes with long-range interactions
Róbert Juhász
We study the local persistence probability during non-stationary time evolutions in disordered contact processes with long-range interactions by a combination of the strong-disorde…
Entanglement scaling in fermion chains with a localization-delocalization transition and inhomogeneous modulations
Gergő Roósz, Zoltán Zimborás, Róbert Juhász
We study the scaling of logarithmic negativity between adjacent subsystems in critical fermion chains with various inhomogeneous modulations through numerically calculating its rec…
Population boundary across an environmental gradient: Effects of quenched disorder
R. Juhász, I. A. Kovács
Population boundary is a classic indicator of climatic response in ecology. In addition to known challenges, the spatial and dynamical characteristics of the boundary are not only…
Entanglement Entropy of Disordered Quantum Wire Junctions
Róbert Juhász, Johannes M. Oberreuter, Zoltán Zimborás
We consider different disordered lattice models composed of linear chains glued together in a star-like manner, and study the scaling of the entanglement between one arm and th…
Entanglement across extended random defects in the XX spin chain
Róbert Juhász
We study the half-chain entanglement entropy in the ground state of the spin-1/2 XX chain across an extended random defect, where the strength of disorder decays with the distance…
Entanglement between random and clean quantum spin chains
Robert Juhász, István A. Kovács, Gergő Roósz +1
The entanglement entropy in clean, as well as in random quantum spin chains has a logarithmic size-dependence at the critical point. Here, we study the entanglement of composite sy…
Long-range random transverse-field Ising model in three dimensions
István A. Kovács, Róbert Juhász, Ferenc Iglói
We consider the random transverse-field Ising model in dimensions with long-range ferromagnetic interactions which decay as a power with the distance. Using a variant…
Nonequilibrium dynamics of the Ising chain in a fluctuating transverse field
G. Roósz, R. Juhász, F. Iglói
We study nonequilibrium dynamics of the quantum Ising chain at zero temperature when the transverse field is varied stochastically. In the equivalent fermion representation, the eq…
Extinction transition in stochastic population dynamics in a random, convective environment
Róbert Juhász
Motivated by modeling the dynamics of a population living in a flowing medium where the environmental factors are random in space, we have studied an asymmetric variant of the one-…
The effect of asymmetric disorder on the diffusion in arbitrary networks
Róbert Juhász
Considering diffusion in the presence of asymmetric disorder, an exact relationship between the strength of weak disorder and the electric resistance of the corresponding resistor…
Mean field treatment of exclusion processes with random-force disorder
Róbert Juhász
The asymmetric simple exclusion process with random-force disorder is studied within the mean field approximation. The stationary current through a domain with reversed bias is ana…
Griffiths phases in the contact process on complex networks
Géza Ódor, Róbert Juhász, Claudio Castellano +1
Dynamical processes occurring on top of complex networks have become an exciting area of research. Quenched disorder plays a relevant role in general dynamical processes and phase…
Dynamics at barriers in bidirectional two-lane exclusion processes
Róbert Juhász
A two-lane exclusion process is studied where particles move in the two lanes in opposite directions and are able to change lanes. The focus is on the steady state behavior in situ…
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…
Entanglement entropy in aperiodic singlet phases
Róbert Juhász, Zoltán Zimborás
We study the average entanglement entropy of blocks of contiguous spins in aperiodic XXZ chains which possess an aperiodic singlet phase at least in a certain limit of the coupling…
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…
Random antiferromagnetic quantum spin chains: Exact results from scaling of rare regions
F. Igloi, R. Juhasz, H. Rieger
We study XY and dimerized XX spin-1/2 chains with random exchange couplings by analytical and numerical methods and scaling considerations. We extend previous investigations to dyn…
Critical exponents of random XX and XY chains: Exact results via random walks
H. Rieger, R. Juhasz, F. Igloi
We study random XY and (dimerized) XX spin-1/2 quantum spin chains at their quantum phase transition driven by the anisotropy and dimerization, respectively. Using exact expression…
Transverse-field Ising spin chain with inhomogeneous disorder
Dragi Karevski, Róbert Juhász, Loïc Turban +1
We consider the critical and off-critical properties at the boundary of the random transverse-field Ising spin chain when the distribution of the couplings and/or transverse fields…