Krylov fractality and complexity in generic random matrix ensembles

B Bhattacharjee, P Nandy - Physical Review B, 2025 - APS
Krylov space methods provide an efficient framework for analyzing the static and dynamical
aspects of quantum systems, with tridiagonal matrices playing a key role. Despite their …

Proposal for many-body quantum chaos detection

AK Das, C Cianci, DGA Cabral, DA Zarate-Herrada… - Physical Review …, 2025 - APS
In this work, the term “quantum chaos” refers to spectral correlations similar to those found in
the random matrix theory. Quantum chaos can be diagnosed through the analysis of level …

Multifractal phase in the weighted adjacency matrices of random Erdös-Rényi graphs

LF Cugliandolo, G Schehr, M Tarzia, D Venturelli - Physical Review B, 2024 - APS
We study the spectral properties of the adjacency matrix in the giant connected component
of Erdös-Rényi random graphs, with average degree p and randomly distributed hop** …

Robust nonergodicity of the ground states in the ensemble

AK Das, A Ghosh, IM Khaymovich - Physical Review B, 2024 - APS
In various chaotic quantum many-body systems, the ground states show nontrivial athermal
behavior despite the bulk states exhibiting thermalization. Such athermal states play a …

KPZ scaling from the Krylov space

A Gorsky, S Nechaev, A Valov - Journal of High Energy Physics, 2024 - Springer
A bstract Recently, a superdiffusion exhibiting the Kardar-Parisi-Zhang (KPZ) scaling in late-
time correlators and autocorrelators of certain interacting many-body systems, such as …

Reducing dynamical fluctuations and enforcing self-averaging by opening many-body quantum systems

I Vallejo-Fabila, AK Das, DA Zarate-Herrada… - Physical Review B, 2024 - APS
We investigate how the dynamical fluctuations of many-body quantum systems out of
equilibrium can be mitigated when they are opened to a dephasing environment. We …

Long-range spectral statistics of the Rosenzweig-Porter model

W Buijsman - Physical Review B, 2024 - APS
The Rosenzweig-Porter model is a single-parameter random matrix ensemble that supports
an ergodic, fractal, and localized phase. The names of these phases refer to the properties …

Soft modes in vector spin glass models on sparse random graphs

S Franz, C Lupo, F Nicoletti, G Parisi, F Ricci-Tersenghi - Physical Review B, 2025 - APS
We study numerically the Hessian of low-lying minima of vector spin glass models defined
on random regular graphs. We consider the two-component (XY) and three-component …

[HTML][HTML] Probing multi-mobility edges in quasiperiodic mosaic lattices

J Gao, IM Khaymovich, XW Wang, ZS Xu, A Iovan… - Science Bulletin, 2025 - Elsevier
The mobility edge (ME) is a crucial concept in understanding localization physics, marking
the critical transition between extended and localized states in the energy spectrum …

Method to discriminate between localized and chaotic quantum systems

Y Aziz Alaoui, B Laburthe-Tolra - Physical Review Research, 2024 - APS
We study whether a generic isolated quantum system initially set out of equilibrium can be
considered as localized close to its initial state. Our approach considers the time evolution in …