Statistical mechanics provides a framework for describing the physics of large, complex
many-body systems using only a few macroscopic parameters to determine the state of the …

Over the last decade impressive progress has been made in the theoretical understanding
of transport properties of clean, one-dimensional quantum lattice systems. Many physically …

A bstract We apply a notion of quantum complexity, called “Krylov complexity”, to study the
evolution of systems from integrability to chaos. For this purpose we investigate the …

Eigenstate thermalization is widely accepted as the mechanism behind thermalization in
generic isolated quantum systems. Using the example of a single magnetic defect …

We investigate the stability of the many-body localized phase for a system in contact with a
single ergodic grain modeling a Griffiths region with low disorder. Our numerical analysis …

Using numerical exact diagonalization, we study matrix elements of a local spin operator in
the eigenbasis of two different nonintegrable quantum spin chains. Our emphasis is on the …

The eigenstate thermalization hypothesis (ETH) is a successful theory that provides
sufficient criteria for ergodicity in quantum many-body systems. Most studies were carried …

Building upon recent research in spin systems with nonlocal interactions, this study
investigates operator growth using the Krylov complexity in different nonlocal versions of the …

We study the spin and energy dynamics in one-dimensional spin-1 2 systems induced by
local quantum quenches at finite temperatures using a time-dependent density matrix …

We study the matrix elements of local operators in the eigenstates of the integrable XXZ
chain and of the quantum-chaotic model obtained by locally perturbing the XXZ chain with a …