Recent content by jeon3133

In the special case where i and j run over three values, γn[C] = ∫∫A[C] dA e[s ] ⋅ Vn[s ], ----- (1) where e[s ] is the unit vector normal to the surface A[C] at the point s, and Vn[s ] is a three-vector in parameter space: Vn[s ] ≡ i ∑m≠n{(Φn[s ], [∇H [s ]] Φm[s ])* × (Φn[s ], [∇H [s ]]...

Homework Statement : Consider a Hamiltonian H[s ] that depends on a number of slowly varying parameters collectively called s(t). What is the effect on the Berry phase γn[C] for a given closed curve C, if H[s ] is replaced with f[s ] H[s ], where f[s ] is an arbitrary real numerical function of...