Enhancement of thermal quantum coherence and teleportation in an Ising-XXZ diamond chain through impurity-induced effects

Abstract

In this work we analyze the quantum coherence in a spin-1/2 Ising-XXZ diamond chain with a distorted impurity on a single plaquette. We show that introducing an impurity into the chain can significantly enhance entanglement and quantum correlations compared to the original model without impurity. Due to the flexibility in choosing impurity parameters, the proposed model presented is highly general, which could prove useful for future experimental measurements. Our main goal is to examine the behavior of thermal quantum correlations, specifically focusing on entanglement, quantum coherence, and local quantum Fisher information. In addition, we studied quantum teleportation through a quantum channel composed by a coupled of Heisenberg dimers with distorted impurity in an Ising-XXZ diamond chain, as well as fidelity in teleportation. Our analysis demonstrates that an appropriate choice of parameters can significantly enhance all the measures analyzed. For comparison, we present our results alongside the measurements obtained for the original model, without impurity, studied in previous works.