Анотація:
The influence of the inhomogeneity on the macroscopic thermal pairwise entanglement for the system of
coupled spins 1/2 (qubits) has been studied. The most important effect of the inhomogeneity on the thermal entanglement
is in the new role of the external potential (magnetic field), which can produce nonzero entanglement
for qubits, situated not far from the inhomogeneity.