Density-wave instability and collective modes in a bilayer of soft-core fermions
POSTER
Abstract
We study the dynamics of a bilayer system of fermions with repulsive soft-core Rydberg-dressed interactions
within the mean-field random-phase approximation. We study the symmetric and antisymmetric
collective density modes of the symmetric (equal density) bilayer and find that the dispersion of the
modes signals the emergence of the density wave instability. Depending on the density of fermions in
each layer, interaction strength, and the spacing between two layers, the homogeneous superfluid phase
becomes unstable in either (or both) of these two channels, leading to density and pseudo-spin-density
wave instabilities in the system.
within the mean-field random-phase approximation. We study the symmetric and antisymmetric
collective density modes of the symmetric (equal density) bilayer and find that the dispersion of the
modes signals the emergence of the density wave instability. Depending on the density of fermions in
each layer, interaction strength, and the spacing between two layers, the homogeneous superfluid phase
becomes unstable in either (or both) of these two channels, leading to density and pseudo-spin-density
wave instabilities in the system.
*Support from TUBITAK and TUBA is gratefully acknowledged.
Presenters
-
B. Tanatar
- Bilkent University