Wigner Crystallization in Rapidly Rotating 2D Dipolar Fermi Gases
Abstract
We study the competition between the Wigner crystal and the Laughlin liquid states in an ultracold quasi two-dimensional rapidly rotating polarized fermionic dipolar gas, and find that the Wigner crystal has a lower energy below a critical filling factor. We examine the quantum crystal to liquid transition for different confinements in the third direction. Our analysis of the phonon spectra of the Wigner crystal with the account of phonon-phonon interactions also shows the stability of the Wigner crystal for sufficiently low filling factors ( <1/7).
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