Istv'an A. Kov'acs

collaborators

6 papers

cond-mat.dis-nn2025

Universal shape-dependence of quantum entanglement in disordered magnets

Natalie Love, IstvÃ¡n A. KovÃ¡cs

Disordered quantum magnets are not only experimentally relevant, but offer efficient computational methodologies to calculate the low energy states as well as various measures of q…

math.GR2025

Dihedral groups of square-free order are DCI-groups

IstvÃ¡n KovÃ¡cs, GÃ¡bor Somlai

A finite group $G$ is a called a DCI-group if any two isomorphic Cayley digraphs of $G$ are also isomorphic via an automorphism of $G$ . If $G$ is a non-abelian generalised dihedral…

cond-mat.stat-mech2025

Activity propagation with Hebbian learning

Will T. Engedal, RÃ³bert JuhÃ¡sz, IstvÃ¡n A. KovÃ¡cs

We investigate the impact of Hebbian learning on the contact process, a paradigmatic model for infection spreading, which has been also proposed as a simple model to capture the dy…

cond-mat.stat-mech2025

Multicritical Infection Spreading

Leone V. Luzzatto, Juan Felipe Barrera LÃ³pez, IstvÃ¡n A. KovÃ¡cs

The contact process is a simple infection spreading model showcasing an out-of-equilibrium phase transition between a macroscopically active and an inactive phase. Such absorbing s…

cond-mat.dis-nn2025

Random transverse and longitudinal field Ising chains

TamÃ¡s PetÃ¶, Ferenc IglÃ³i, IstvÃ¡n A. KovÃ¡cs

Motivated by experimental results on compounds like $LiHo_{x} Y_{1 - x} F_{4}$ , we consider an Ising chain with random bonds in the simultaneous presence of random transv…

math.CO2025

Cyclic $m$ -DCI-groups and $m$ -CI-groups

IstvÃ¡n KovÃ¡cs, Luka Å inkovec

Based on the earlier work of Li (European J. Combin. 1997) and Dobson (Discrete Math. 2008), in this paper we complete the classification of cyclic $m$ -DCI-groups and $m$ -CI-groups…