A bstract We study a notion of operator growth known as Krylov complexity in free and
interacting massive scalar quantum field theories in d-dimensions at finite temperature. We …

A bstract We study a precise and computationally tractable notion of operator complexity in
holographic quantum theories, including the ensemble dual of Jackiw-Teitelboim gravity and …

We study the entanglement of thermal and ground states in the Heisenberg XX qubit rings
with a magnetic field. A general result is found that for even-number rings, pairwise …

I extend the scope of the density-matrix renormalization-group technique developed by
White to the calculation of dynamical correlation functions using the continuous fraction …

Two-dimensional hard core bosons suffer strong scattering in the high-temperature resistive
state at half filling. The dynamical conductivity σ (ω) is calculated using nonperturbative tools …

Phase diagram, critical properties and thermodynamic functions of the two-dimensional field-
free quantum-spin-1/2 XXZ model has been calculated globally using a numerical …

We present a detailed investigation of the XXZ Heisenberg model for spin-1/2 and spin-1
systems on square and honeycomb lattices. Utilizing the density-matrix renormalization …

We report an implementation of the recursion method that addresses quantum many-body
dynamics in the nonperturbative regime. The method essentially amounts to constructing a …

We propose an efficient numerical method to obtain local order parameter in two-
dimensional systems using spiral boundary conditions. As a benchmark, we first estimate …

We study the bipartite entanglement per bond to determine characteristic features of the
phase diagram of various quantum spin models in different spatial dimensions. The bipartite …