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

2008/09/29 by Szu-Cheng Cheng, Cheng, Szu-Cheng
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Quantum optics and atomic interactions #cond-mat.mes-hall

paper · pdf · doi:10.48550/arxiv.0809.4972

13 pages, 3 figures

arxiv created 2008/09/29 · openalex publication_date 2008/09/29 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

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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• Collective Excitations of Rotating Dipolar Fermi Gases in the Fractional Quantum Hall Regime
• Collective excitation spectra of dipolar bosonic fractional quantum Hall states
• Instabilities and the roton spectrum of a quasi-1D Bose-Einstein condensed gas with dipole-dipole interactions
• Static and dynamical properties of a two-dimensional Wigner crystal of rotating dipolar Fermi gases
• Collective excitations and instabilities in multi-layer stacks of dipolar condensates