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quant-ph2008★ 22 cited
Dynamical symmetry of Dirac hydrogen atom with spin symmetry and its connection with Ginocchio's oscillator
Fu-Lin Zhang, Bo Fu, Jing-Ling Chen
The Dirac hydrogen atom with spin symmetry is shown has a SO(4) symmetry. The generators are derived, and the corresponding Casimir operator leads to the energy spectrum naturally.…
quant-ph2008★ 52 cited
Berry phase and quantum criticality in Yang--Baxter systems
Jing-Ling Chen, Kang Xue, Mo-Lin Ge
Spin interaction Hamiltonians are obtained from the unitary Yang--Baxter -matrix. Based on which, we study Berry phase and quantum criticality in the Yang--Baxter system…