Equation Icon  (VBT Zα A+ ) e−μ¯s TrKBTZ α = ---3-- + ----(2πα)c2(α ) ¯s -----3∕2 l l (4π¯s) 2 e−μ¯s A ∞∑ sinh Δψn- e− Δψ4n¯s +2π -----3∕2--+-¯s ------α-- -----2 Δ-ψn------2 γn-, (235 ) (4π¯s) l n=1 sinh Δψn (sinh -2α-+ sinh 2α)