Excitation Spectrum and Stability from a Filled Landau Level in Rotating Dipolar Fermi Gases

Details Excitation Spectrum and Stability from a Filled Landau Level in Rotating Dipolar Fermi Gases Excitation Spectrum and Stability from a Filled Landau Level in Rotating Dipolar Fermi Gases

2008-09-29

arxiv.org/abs/0809.4972v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

13 pages, 3 figures

Scientific paper

We apply the equation-of-motion method to study the collective excitation spectrum from a filled Landau level in rotating dipolar Fermi gases. The predicted excitation spectrum of rotating dipolar Fermi gases can exhibit a roton-minimum character. This roton character is tunable by varying the dipole interaction strength and confining potential. An increase of the dipole interaction strength makes the roton minimum becoming zero, and the system becomes unstable. We also obtain a condition for the dynamical stability of rotating dipolar Fermi gases.

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