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- W2310362094 abstract "We investigate the ground-state Riemannian metric and the cyclic quantum distance of an inhomogeneous quantum spin-1/2 chain in a transverse field. This model can be diagonalized by using a general canonical transformation to the fermionic Hamiltonian mapped from the spin system. The ground-state Riemannian metric is derived exactly on a parameter manifold ring S1, which is introduced by performing a gauge transformation to the spin Hamiltonian through a twist operator. The cyclic ground-state quantum distance and the second derivative of the ground-state energy are studied in different exchange coupling parameter regions. Particularly, we show that, in the case of exchange coupling parameter J a = J b, the quantum ferromagnetic phase can be characterized by an invariant quantum distance and this distance will decay to zero rapidly in the paramagnetic phase." @default.
- W2310362094 created "2016-06-24" @default.
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- W2310362094 date "2015-01-01" @default.
- W2310362094 modified "2023-10-16" @default.
- W2310362094 title "Ground-state information geometry and quantum criticality in an inhomogeneous spin model" @default.
- W2310362094 hasPublicationYear "2015" @default.
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