Complex networks with complex weights

L Böttcher, MA Porter - Physical Review E, 2024 - APS
In many studies, it is common to use binary (ie, unweighted) edges to examine networks of
entities that are either adjacent or not adjacent. Researchers have generalized such binary …

Many-body quantum chaos and dual-unitarity round-a-face

T Prosen - Chaos: An Interdisciplinary Journal of Nonlinear …, 2021 - pubs.aip.org
We propose a new type of locally interacting quantum circuits—quantum cellular automata—
that are generated by unitary interactions round-a-face (IRF). Specifically, we discuss a set …

Scrambling in quantum cellular automata

B Kent, S Racz, S Shashi - Physical Review B, 2023 - APS
Scrambling is the delocalization of quantum information over a many-body system and
underlies all quantum-chaotic dynamics. We employ discrete quantum cellular automata as …

Emergent complex quantum networks in continuous-variables non-Gaussian states

M Walschaers, B Sundar, N Treps… - Quantum Science …, 2023 - iopscience.iop.org
We use complex network theory to study a class of photonic continuous variable quantum
states that present both multipartite entanglement and non-Gaussian statistics. We consider …

Small-world complex network generation on a digital quantum processor

EB Jones, LE Hillberry, MT Jones, M Fasihi… - Nature …, 2022 - nature.com
Quantum cellular automata (QCA) evolve qubits in a quantum circuit depending only on the
states of their neighborhoods and model how rich physical complexity can emerge from a …

Entanglement in the quantum Game of Life

PM Ney, S Notarnicola, S Montangero, G Morigi - Physical Review A, 2022 - APS
We investigate the quantum dynamics of a spin chain that implements a quantum analog of
Conway's Game of Life. We solve the time-dependent Schrödinger equation starting with …

Complex systems in the spotlight: next steps after the 2021 Nobel Prize in Physics

G Bianconi, A Arenas, J Biamonte… - Journal of Physics …, 2023 - iopscience.iop.org
Abstract The 2021 Nobel Prize in Physics recognized the fundamental role of complex
systems in the natural sciences. In order to celebrate this milestone, this editorial presents …

Entanglement dynamics and ergodicity breaking in a quantum cellular automaton

K Sellapillay, AD Verga, G Di Molfetta - Physical Review B, 2022 - APS
Ergodicity breaking is observed in the blockade regime of Rydberg atom arrays, in the form
of low entanglement eigenstates known as scars, which fail to thermalize. The signature of …

Quantum and Classical Temporal Correlations in Quantum Cellular Automata

E Gillman, F Carollo, I Lesanovsky - Physical Review Letters, 2021 - APS
We employ (1+ 1)-dimensional quantum cellular automata to study the evolution of
entanglement and coherence near criticality in quantum systems that display nonequilibrium …

Directed percolation in nonunitary quantum cellular automata

R Nigmatullin, E Wagner, GK Brennen - Physical Review Research, 2021 - APS
Probabilistic cellular automata (CA) provide a classic framework for studying nonequilibrium
statistical physics on lattices. A notable example is the Domany-Kinzel CA, which has been …