We propose a new approach to probing ergodicity and its breakdown in one-dimensional quantum many-body systems based on their response to a local perturbation. We study the …
C Monthus - The European Physical Journal B, 2019 - Springer
The theory of large deviations is already the natural language for the statistical physics of equilibrium and non-equilibrium. In the field of disordered systems, the analysis via large …
The disordered XXZ model is a prototype model of the many-body localization transition (MBL). Despite numerous studies of this model, the available numerical evidence of …
Eigenstates of local many-body interacting systems that are far from spectral edges are thought to be ergodic and close to being random states. This is consistent with the …
In the field of ergodicity-breaking phases, it has been recognized that quantum avalanches can destabilize many-body localization at a wide range of disorder strengths. This has in …
E Bogomolny, M Sieber - Physical Review E, 2018 - APS
The statistical distribution of eigenfunctions for the Rosenzweig-Porter model is derived for the region where eigenfunctions have fractal behavior. The result is based on simple …
C Monthus - arXiv preprint arXiv:1609.01121, 2016 - arxiv.org
The delocalized non-ergodic phase existing in some random $ N\times N $ matrix models is analyzed via the Wigner-Weisskopf approximation for the dynamics from an initial site $ j_0 …
We analyse the eigenvectors of the adjacency matrix of a critical Erdős–Rényi graph G (N, d/N), where d is of order log N. We show that its spectrum splits into two phases: a …
K Truong, A Ossipov - Europhysics Letters, 2016 - iopscience.iop.org
We consider eigenvectors of the Hamiltonian H 0 perturbed by a generic perturbation V modelled by a random matrix from the Gaussian Unitary Ensemble (GUE). Using the …