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We calculate the pair susceptibility of an attractive spin-polarized Fermigas in the normal phase, as a function of the pair momentum. Close tounitarity, we find a strong enhancement of Fulde-Ferrell-Larkin-Ovchinnikov(FFLO) pairing fluctuations over an extended region of thetemperature-polarization phase diagram, which manifests itself as a pronouncedpeak in the pair-momentum distribution at a finite pair momentum. This peakshould be amenable to experimental observation at achievable temperatures in abox-like trapping potential, as a fingerprint of FFLO pairing. Our calculationsrest on a self-consistent t-matrix approach which, for the unitary balancedFermi gas, has been validated against experimental data for severalthermodynamic quantities.

Strong Fulde-Ferrell Larkin-Ovchinnikov pairing fluctuations in polarized Fermi systems