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C. Energy Difference28: $ W_{BCS}^{0}-W_{n}^{0}$


\begin{singlespace} % latex2html id marker 1936From equation (\ref{eq:W0_BCS_d... ...-\frac{1}{2}Z(E_{F}^{0})\Delta ^{2}L^{3}.\end{displaymath}\par \end{singlespace}


Footnotes

... Difference28
Based on Ibach and Lüth (1996, p.238); Tinkham (1996, p.57-58).
... $ integration$29
Note the identity: $(x+x^2+a^2a)=^-1(xa).$

Ben Luey