Phase diagram and dynamics of Rydberg-dressed fermions in two dimensions
Author
Khasseh, R.
Abedinpour, S. H.
Tanatar, Bilal
Date
2017Source Title
Physical Review A
Print ISSN
2469-9926
Publisher
American Physical Society
Volume
96
Issue
5
Pages
053611-1 - 053611-7
Language
English
Type
ArticleItem 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 algorithmsFermi liquids
Ground state
Collective modes
Density oscillations
Ground state properties
Homogeneous system
Local-field factors
Ordered phasis
Random phase approximations
Spectral weight
Hartree approximation