Pairwise entanglement in double-tetrahedral chain with different Land\'e g-factors of the Ising and Heisenberg spins

TL;DR

This paper provides an exact analysis of pairwise entanglement in a spin-1/2 double-tetrahedral chain with different Landé g-factors, revealing how entanglement varies with temperature and magnetic field.

Contribution

It offers a novel exact study of entanglement behavior in a complex quantum spin chain with g-factor differences, including effects of temperature and magnetic field.

Findings

Entanglement is stronger in non-chiral ground states than in chiral ones.

Thermal entanglement diminishes with temperature and vanishes at a threshold.

Strong magnetic fields can sustain weak entanglement far from saturation.

Abstract

The pairwise entanglement is exactly examined in the spin-1/2 Ising-Heisenberg double-tetrahedral chain with different Land\'e g-factors of the Ising and Heisenberg spins at zero and finite temperatures. It is shown that the phenomenon present in quantum non-chiral ground states is twice as strong as in quantum chiral ground states and that it gradually diminishes with increasing temperature until it completely vanishes at a certain threshold temperature. It is also demonstrated that the strong magnetic field maintains a weak thermal entanglement quite far from the saturation field, although the ground state is non-entangled.