289 citations · 787 across the 20 of their papers we have counts for
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quant-ph2009
Raising and lowering operators for angular momentum quantum numbers l in spherical harmonics
Q. H. Liu, D. M. Xun, L. Shan
Two vector operators aimed at shifting angular momentum quantum number l in spherical harmonics |lm>, primarily proposed by Prof. X. L. Ka in 2001, are further studied. For a given…
math-ph2009★ 32 cited
Constraint-induced mean curvature dependence of Cartesian momentum operators
Q. H. Liu, C. L. Tong, M. M. Lai
The Hermitian Cartesian quantum momentum operator for an embedded surface in is proved to be a constant factor times the mean curvature vector f…