Gergely Barcza

1. Introduction Click to copy section linkSection link copied! In computational quantum chemistry, correlation effects are often distinguished into dynamic and static correlations according to their character. (1) The latter one, also known as nondynamic correlation, can be further divided to Type A or left–right strong correlation and Type B or angular strong correlation.

Abstract Topological defects, such as Stone-Wales defects and grain boundaries, are common in 2D materials. In this study, we investigate the intricate interplay of topological defects and carbon contamination in hexagonal boron nitride revealing an intriguing class of color centers. We demonstrate that both carbon contamination and strain can stabilize Stone-Wales configurations and give rise to emitters with desirable optical properties in the visible spectral range.

Parafermions are anyons with the potential for realizing nonlocal qubits that are resilient to local perturbations. Compared with Majorana zero modes, braiding of parafermions implements an extended set of topologically protected quantum gates. This, however, comes at the price that parafermionic zero modes cannot be realized in the absence of strong interactions, posing a challenge for their theoretical depiction.