66 citations · 117 across the 6 of their papers we have counts for
6 papers
Diffusion constants from the recursion method
Jiaozi Wang, Mats H. Lamann, Robin Steinigeweg +1
Understanding the transport behavior of quantum many-body systems constitutes an important physical endeavor, both experimentally and theoretically. While a reliable classification…
Emergence of unitary symmetry of microcanonically truncated operators in chaotic quantum systems
Jiaozi Wang, Jonas Richter, Mats H. Lamann +3
We study statistical properties of matrix elements of observables written in the energy eigenbasis and truncated to small microcanonical windows. We present numerical evidence indi…
Estimation of equilibration time scales from nested fraction approximations
Christian Bartsch, Anatoly Dymarsky, Mats H. Lamann +3
We consider an autocorrelation function of a quantum mechanical system through the lens of the so-called recursive method, by iteratively evaluating Lanczos coefficients, or solvin…
Typical perturbation theory: conditions, accuracy and comparison with a mesoscopic case
Mats H. Lamann, Jochen Gemmer
The perturbation theory based on typicality introduced in Ref. [1] and further refined in Refs. [2, 3] provides a powerful tool since it is intended to be applicable to a wide rang…
Eigenstate thermalization hypothesis and its deviations from random-matrix theory beyond the thermalization time
Jiaozi Wang, Mats H. Lamann, Jonas Richter +3
The Eigenstate Thermalization Hypothesis (ETH) explains emergence of the thermodynamic equilibrium by assuming a particular structure of observable's matrix elements in the energy…
Relaxation of dynamically prepared out-of-equilibrium initial states within and beyond linear response theory
Jonas Richter, Mats H. Lamann, Christian Bartsch +2
We consider a realistic nonequilibrium protocol, where a quantum system in thermal equilibrium is suddenly subjected to an external force. Due to this force, the system is driven o…