265 citations · 2.1k across the 75 of their papers we have counts for
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cond-mat.str-el2022★ 6 cited
Quantum phase transitions in the triangular coupled-top model
Liwei Duan, Yan-Zhi Wang, Qing-Hu Chen
We study the coupled-top model with three large spins located on a triangle. Depending on the coupling strength, there exist three phases: disordered paramagnetic phase, ferromagne…
cond-mat.str-el2008★ 7 cited
Ground-state properties of the two-site Hubbard-Holstein model: an exact solution
Yu-Yu Zhang, Tao Liu, Qing-Hu Chen +2
We revisit the two-site Hubbard-Holstein model by using extended phonon coherent states. The nontrivial singlet bipolaron is studied exactly in the whole coupling regime. The groun…
cond-mat.str-el2008★ 30 cited
Quantum phase transition in the one-dimensional period-two and uniform compass model
Ke-Wei Sun, Yu-Yu Zhang, Qing-Hu Chen
Quantum phase transition in the one-dimensional period-two and uniform quantum compass model are studied by using the pseudo-spin transformation method and the trace map method. Th…