Quantum impurity models (QIMs) are ubiquitous throughout physics. As simplified toy
models they provide crucial insights for understanding more complicated strongly correlated …

We investigate the boundary effects that arise when spin-1 2 impurities interact with the
edges of the antiferromagnetic spin-1 2 Heisenberg chain through spin exchange …

We investigate the boundary phenomena that arise in a finite-size XX spin chain interacting
through an XX interaction with a spin -12 impurity located at its edge. Upon Jordan-Wigner …

A magnetic impurity in a BCS superconductor induces the formation of a Shiba state and
drives a local quantum phase transition. We generalize this concept to a one-dimensional …

We construct an exactly solvable $\mathscr {PT}-$ symmetric non-Hermitian model where a
spin $-\frac {1}{2} $ isotropic quantum Heisenberg spin chain is coupled to two spin $-\frac …

We present a comprehensive analysis of boundary phenomena in a spin-$\frac {1}{2} $
anisotropic Heisenberg chain (XXZ-$\frac {1}{2} $) in the gapped antiferromagnetic phase …

We consider a model describing a system where the superconductivity competes with the
overscreened Kondo effect. The model consists of a single spin $-\frac {1}{2} $ quantum …

One dimensional quantum systems exhibit many interesting physical phenomena as a result
of strong correlations. The gapped systems with symmetries exhibit exotic phases and are …