Diagrammatic Monte Carlo study of the Fermi polaron in two dimensions

@article{Vlietinck2014DiagrammaticMC,
  title={Diagrammatic Monte Carlo study of the Fermi polaron in two dimensions},
  author={J. Vlietinck and Jan Ryckebusch and Kris Van Houcke},
  journal={Physical Review B},
  year={2014},
  volume={89},
  pages={085119}
}
Westudythepropertiesofthetwo-dimensionalFermipolaronmodelinwhichanimpurityattractivelyinteracts with a Fermi sea of particles in the zero-range limit. We use a diagrammatic Monte Carlo (DiagMC) method which allows us to sample a Feynman diagrammatic series to very high order. The convergence properties of the series and the role of multiple particle-hole excitations are discussed. We study the polaron and molecule energy as a function of the coupling strength, revealing a transition from a… 

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