Equation Icon  ---ℏ2--- (q) (q) (q) (q) (q) − ∇ ⋅2m ⊕ (rrr )∇ ϕkkk (rrr) + Uq(rrr)ϕkkk (rrr) − iWWWqqq (rrr) ⋅ ∇ × σσσϕ kkk (rrr) = ε (kkk)ϕkkk (rrr), (63 ) q