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      Phase diagram and dynamics of Rydberg-dressed fermions in two dimensions

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      Author
      Khasseh, R.
      Abedinpour, S. H.
      Tanatar, Bilal
      Date
      2017
      Source Title
      Physical Review A
      Print ISSN
      2469-9926
      Publisher
      American Physical Society
      Volume
      96
      Issue
      5
      Pages
      053611-1 - 053611-7
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      We investigate the ground-state properties and the collective modes of a two-dimensional two-component Rydberg-dressed Fermi liquid in the dipole-blockade regime. We find instability of the homogeneous system toward phase-separated and density ordered phases, using the Hartree-Fock and random-phase approximations, respectively. The spectral weight of collective density oscillations in the homogenous phase also signals the emergence of density-wave instability. We examine the effect of exchange hole on the density-wave instability and on the collective-mode dispersion using the Hubbard local-field factor.
      Keywords
      Approximation algorithms
      Fermi liquids
      Ground state
      Collective modes
      Density oscillations
      Ground state properties
      Homogeneous system
      Local-field factors
      Ordered phasis
      Random phase approximations
      Spectral weight
      Hartree approximation
      Permalink
      http://hdl.handle.net/11693/37140
      Published Version (Please cite this version)
      http://dx.doi.org/10.1103/PhysRevA.96.053611
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