46 citations · 99 across the 4 of their papers we have counts for
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Ground-state Riemannian metric, cyclic quantum distance, and the quantum criticality in an inhomogeneous Ising spin chain
Yu-Quan Ma, Deng-Shan Wang, Ya-Jiang Hao +2
We investigate the ground-state Riemannian metric and the cyclic quantum distance of an inhomogeneous quantum Ising spin-1/2 chain in a transverse field. This model can be diagonal…
Quantum distance and the Euler number index of the Bloch band in a 1D spin model
Yu-Quan Ma
We study the Riemannian metric and the Euler characteristic number of the Bloch band in a 1D spin model with multi-site spins exchange interactions. The Euler number of the Bloch b…
Geometric phase and quantum phase transition in an inhomogeneous periodic XY spin-1/2 model
Yu-Quan Ma, Shu Chen
The notion of geometric phase has been recently introduced to analyze the quantum phase transitions of many-body systems from the geometrical perspective. In this work, we study th…
The Euler Number of Bloch States Manifold and the Quantum Phases in Gapped Fermionic Systems
Yu-Quan Ma, Shi-Jian Gu, Shu Chen +2
We propose a topological Euler number to characterize nontrivial topological phases of gapped fermionic systems, which originates from the Gauss-Bonnet theorem on the Riemannian st…