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Paper   IPM / Physic / 15135
School of Physics
  Title:   Composite quasiparticles in strongly correlated dipolar Fermi liquids
1.  I. Seydi
2.  S. H. Abedinpour
3.  R. Asgari
4.  B. Tanatar
  Status:   Published
  Journal: Phys. Rev. A
  Vol.:  98
  Year:  2018
  Pages:   063623
  Supported by:  IPM
Strong particle-plasmon interaction in electronic systems can lead to composite hole-plasmon excitations. We investigate the emergence of similar composite quasiparticles in ultracold dipolar Fermi liquids originating from the long-range dipole-dipole interaction. We use the G0W technique with an effective interaction obtained from the static structure factor to calculate the quasiparticle properties and single-particle spectral function. We first demonstrate that within this formalism a very good agreement with the quantum Monte Carlo results could be achieved over a wide range of coupling strengths for the renormalization constant and effective mass. The composite particle-zero sound excitations which are undamped at long wavelengths emerge at intermediate and strong couplings in the spectral function and should be detectable through the radio frequency spectroscopy of nonreactive polar molecules at high densities.

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