Equation Icon  1 ∂ˆϕ† ∂ˆϕ ( m2c2 ) ˆℒ = -- -------− ∇ ϕˆ† ⋅ ∇ ˆϕ − -----+ V(t,x ) ϕˆ†ˆϕ − U(ϕˆ†ϕˆ; λi) , (276 ) c2 ∂t ∂t ℏ2