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Quantum fluctuations in the superfluid state of the BCS-BEC crossover
We determine the effects of quantum fluctuations about the $T=0$ mean-field solution of the BCS-BEC crossover in a dilute Fermi gas using the functional integral method. These fluctuations are described in terms of the zero-point motion of collective modes and the virtual scattering of gapped quasiparticles. We calculate their effects …