Regrowth of the QD with temperature in spin-1/2 Ising chain in a transverse field with added transverse Dzyaloshinskii–Moriya interaction

Abstract We consider the spin-1/2 Ising chain model in a transverse field (TF) with added transverse Dzyaloshinskii-Moriya (TDM) interaction in the thermodynamic limit and compute the entanglement and the quantum discord (QD) between the nearest neighbour pair of spins at finite temperature. The critical temperature, where the entanglement disappears, is calculated in the whole range of Hamiltonian parameters. Our exact results reveal that by properly tuning Hamiltonian parameters, observing regrowth of the QD is possible in the mentioned infinite chain system. We also came to this conclusion that the regrowth of thermal QD is related to the mid-lying excited states of the model.