Ground-state information geometry and quantum criticality in an inhomogeneous spin model |
(a) The cyclical quantum distance l (0, π ) as a function of Jb / Ja and h with the fixed parameter J a = 1, and the system size N → ∞; (b) the second derivative of the ground-state energy E g/ N with respect to h , as a function of Jb / Ja and h with the fixed parameter J a = 1, and the system size N = 1001. |