Phase diagram and dynamics of Rydberg-dressed fermions in two dimensions
Date
2017
Authors
Khasseh, R.
Abedinpour, S. H.
Tanatar, Bilal
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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.
Source Title
Physical Review A
Publisher
American Physical Society
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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
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English
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Article