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2/4=0 for |q| < √8mμ when μ>0. Note also that the Bogoliubov-Anderson mode (full line) terminates at |ω|=2Δ in the upper panel of Fig. 7, while it remains below the particle-particle continuum (dashed lines) in the middle and lower panels of Fig. 7.
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0(T=0)=n for all couplings. More generally for any coupling, in our theory (quantum) fluctuation corrections to mean-field quantities survive even at T=0 while in the theory of Ref. 19 fluctuation corrections vanish identically at T=0.
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R(k, ω). This is the case for the "anomalous" retarded and advanced Green's functions resulting from the approximate expression (36) of the text with a real order parameter Δ.
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