43 citations · 96 across the 17 of their papers we have counts for
17 papers
Quantum entanglement in the multicritical disordered Ising model
István Kovács
Here, the entanglement entropy is calculated at the quantum multicritical point of the random transverse-field Ising model (RTIM). We use an efficient implementation of the strong…
Quantum Communication Networks Enhanced by Distributed Quantum Memories
Xiangyi Meng, Nicolò Lo Piparo, Kae Nemoto +1
Building large-scale quantum communication networks has its unique challenges. Here, we demonstrate that a network-wide synergistic usage of quantum memories distributed in a quant…
Stability of Cayley graphs and Schur rings
Ademir Hujdurović, István Kovács
A graph is said to be unstable if for the direct product , is not isomorphic to . In this paper we show that a conne…
Cluster tomography in percolation
Helen S. Ansell, Samuel J. Frank, István A. Kovács
In cluster tomography, we propose measuring the number of clusters intersected by a line segment of length across a finite sample. As expected, the leading order of $N(\…
Unveiling universal aspects of the cellular anatomy of the brain
Helen S. Ansell, István A. Kovács
Recent cellular-level volumetric brain reconstructions have revealed high levels of anatomic complexity. Determining which structural aspects of the brain to focus on, especially w…
Stability of Rose Window graphs
Milad Ahanjideh, István Kovács, Klavdija Kutnar
A graph is said to be stable if for the direct product , is isomorphic to ; otherwise,…
Proper network randomization is key to assessing social balance
Bingjie Hao, István A. Kovács
Studying significant network patterns, known as graphlets (or motifs), has been a popular approach to understand the underlying organizing principles of complex networks. Statistic…
Neuroscience needs Network Science
Dániel L Barabási, Ginestra Bianconi, Ed Bullmore +17
The brain is a complex system comprising a myriad of interacting elements, posing significant challenges in understanding its structure, function, and dynamics. Network science has…
Complex quantum network models from spin clusters
Ravi Chepuri, István A. Kovács
In the emerging quantum internet, complex network topology could lead to efficient quantum communication and enhanced robustness against failures. However, there are some concerns…
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…
Edge-transitive core-free Nest graphs
István Kovács
A finite simple graph is called a Nest graph if it is regular of valency and admits an automorphism with two orbits of the same length such that at least one of the sub…
Multipartite Entanglement in the Random Ising Chain
Jay S. Zou, Helen S. Ansell, István A. Kovács
Quantifying entanglement of multiple subsystems is a challenging open problem in interacting quantum systems. Here, we focus on two subsystems of length separated by a dista…
Intersection density of transitive groups with cyclic point stabilizers
Ademir Hujdurović, István Kovács, Klavdija Kutnar +1
For a permutation group acting on a set , a subset of is said to be an intersecting set if for every pair of elements there exists $v…
CI-property of and for digraphs
István Kovács, Mikhail Muzychuk, Péter P. Pálfy +2
We prove that the direct product of two coprime order elementary abelian groups of rank two, as well as the direct product of a cyclic group of prime order and a cyclic group of sq…
On certain edge-transitive bicirculants of twice odd order
István Kovács, János Ruff
A graph admitting an automorphism with two orbits of the same length is called a bicirculant. Recently, Jajcay et al. initiated the investigation of the edge-transitive bicirculant…
Quantum multicritical point in the two- and three-dimensional random transverse-field Ising model
István A. Kovács
Quantum multicritical points (QMCPs) emerge at the junction of two or more quantum phase transitions due to the interplay of disparate fluctuations, leading to novel universality c…
Universal logarithmic terms in the entanglement entropy of 2d, 3d and 4d random transverse-field Ising models
István A. Kovács, Ferenc Iglói
The entanglement entropy of the random transverse-field Ising model is calculated by a numerical implementation of the asymptotically exact strong disorder renormalization group me…