29 citations · 112 across the 24 of their papers we have counts for
6 papers · 1 filter
Extreme statistics of the excitations in the random transverse Ising chain
István A. Kovács, Tamás Pető, Ferenc Iglói
In random quantum magnets, like the random transverse Ising chain, the low energy excitations are localized in rare regions and there are only weak correlations between them. It is…
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…
Entanglement entropy of random partitioning
Gergö Roósz, István A. Kovács, Ferenc Iglói
We study the entanglement entropy of random partitions in one- and two-dimensional critical fermionic systems. In an infinite system we consider a finite, connected (hypercubic) do…
Transverse-spin correlations of the random transverse-field Ising model
Ferenc Iglói, István A. Kovács
The critical behavior of the random transverse-field Ising model in finite dimensional lattices is governed by infinite disorder fixed points, several properties of which have alre…
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…
Boundary critical phenomena of the random transverse Ising model in D>=2 dimensions
István A. Kovács, Ferenc Iglói
Using the strong disorder renormalization group method we study numerically the critical behavior of the random transverse Ising model at a free surface, at a corner and at an edge…