Composite quasiparticles in strongly-correlated dipolar Fermi liquids

Abstract

Strong particle-plasmon interaction in electronic systems can lead to composite \emph{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 $G_{0}W$ 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 \textit{quasiparticle-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.

arXiv comment9 pages, 7 figures, submitted

References in corpus (17)

• Condensed Matter Theory of Dipolar Quantum Gases
• The Role of Electron-electron Interactions in Graphene ARPES Spectra
• Radio-Frequency Spectroscopy of Ultracold Fermions
• The quasiparticle spectral function in doped graphene
• Density wave instability in a 2D dipolar Fermi gas
• Excitations and Stripe Phase Formation in a 2D Dipolar Bose Gas with Tilted Polarization
• Liquid and crystal phase of dipolar fermions in two dimensions
• Quasiparticle self-energy and many-body effective mass enhancement in a two-dimensional electron liquid
• Density instabilities in a two-dimensional dipolar Fermi gas
• Collective modes, stability and superfluid transition of a quasi-two-dimensional dipolar Fermi gas
• Physics of ultracold Fermi gases revealed by spectroscopies
• Density Waves in Layered Systems with Fermionic Polar Molecules
• Novel Fermi Liquid of 2D Polar Molecules
• The effect of sublattice symmetry breaking on the electronic properties of a doped graphene
• The effective mass of two--dimensional 3He
• Ground-state and dynamical properties of two-dimensional dipolar Fermi liquids
• Zero sound in a two-dimensional dipolar Fermi gas

Cited by in corpus (3)

• Many-body exchange-correlation effects in MoS${}_2$ monolayer: The key role of nonlocal dielectric screening
• Optimized correlations inspired by perturbation theory
• Rydberg-dressed Fermi liquid: correlations and signatures of droplet crystallization