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93 papers · 1 filter
Supervised and unsupervised learning of the many-body critical phase, phase transitions, and critical exponents in disordered quantum systems
Aamna Ahmed, Nilanjan Roy
In this work, we begin by questioning the existence of a new kind of nonergodic extended phase, namely, the many-body critical (MBC) phase in finite systems of an interacting quasi…
Integrability, multifractality, and two-photon dynamics in disordered Tavis-Cummings models
Agnieszka Wierzchucka, Francesco Piazza, Pieter W. Claeys
The Tavis-Cummings model is a paradigmatic central-mode model where a set of two-level quantum emitters (spins) are coupled to a collective cavity mode. Here we study the eigenstat…
An invariant measure of chiral quantum transport
Klaus Ziegler
We study the invariant measure of the transport correlator for a chiral Hamiltonian and analyze its properties. The Jacobian of the invariant measure is a function of random phases…
Quantum evolution with random phase scattering
Klaus Ziegler
We consider the quantum evolution of a fermion-hole pair in a d-dimensional gas of non-interacting fermions in the presence of random phase scattering. This system is mapped onto a…
Dipolar relaxation, conductivity, and polar order in AgCN
P. Lunkenheimer, A. Loidl, G. P. Johari
By using dielectric spectroscopy in a broad range of temperatures and frequencies, we have investigated dipolar relaxations, the dc conductivity, and the possible occurrence of pol…
Empowering deep neural quantum states through efficient optimization
Ao Chen, Markus Heyl
Computing the ground state of interacting quantum matter is a long-standing challenge, especially for complex two-dimensional systems. Recent developments have highlighted the pote…