We review concepts and methods associated with quantum discord and related topics. We
also describe their possible connections with other aspects of quantum information and …

The ground-state parameters of the two-dimensional S= 1/2 antiferromagnetic Heisenberg
model are calculated using the stochastic series expansion quantum Monte Carlo method …

We explore quantum and classical correlations along with coherence in the ground states of
spin-1 Heisenberg chains, namely the one-dimensional XXZ model and the one …

Motivated directly by recent trapped-ion quantum simulation experiments, we carry out a
comprehensive study of the phase diagram of a spin-1 chain with XXZ-type interactions that …

Phase transitions between the XY, the dimer, and the Haldane phases of the spin-1 bond-
alternating XXZ chain are studied numerically. By use of the “level spectroscopy” we …

Using the density-matrix renormalization-group technique we study the long-wavelength
properties of the spin S= 3/2 nearest-neighbor Heisenberg chain. We obtain an accurate …

We studied a multi-orbital Hubbard model at half-filling for two and three orbitals per site on
a two-site cluster via full exact diagonalization, in a wide range for the onsite repulsion U …

We consider space-time correlations in driven diffusive systems which undergo a fluctuation
into a regime with an atypically large current or dynamical activity. For a single conserved …

Strongly-correlated quantum many-body systems are difficult to study and simulate
classically. Our recent work [arXiv: 2108.13401] proposed a variational quantum eigensolver …

Level statistics are a useful probe for detecting symmetries and distinguishing integrable
and non-integrable systems. I show by way of several examples that level statistics detect …