Fig. 4
From: Jahn-Teller effect for controlling quantum correlations in hexanuclear Fe\(^{3+}\) magnets
(a) Magnetic-field dependence of the conditional entropy \(\mathcal {S}_\mathcal {A|B}\) of the Fe\(^{3+}\) complex under JT effect at different temperatures. The coupling constants are \(J_1 = 42.2\, \text {cm}^{-1}\), \(J_2 = 34.2\,\text {cm}^{-1}\), \(J_3 = 0.015\,\text {cm}^{-1}\), and the gyromagnetic factor is \(g = 2.0\)19. (b) The conditional entropy \(\mathcal {S}_\mathcal {A|B}\) of the equilateral triangle shape of the subsystems \(\mathcal {A}\) and \(\mathcal {B}\) with \(J_1 = J_2 = 42.2\, \text {cm}^{-1}\) and \(J_3 = 0.015\,\text {cm}^{-1}\). (c) Conditional von Neumann entropy \(\mathcal {S}_\mathcal {A|B}\) in the (\(B, J_3\)) plane, assuming \(J_1 = 42.2\, \text {cm}^{-1}\) and \(J_2 = 34.2\,\text {cm}^{-1}\).
