Quantum Hall effects in fast-rotating Fermi gases with anisotropic dipolar interaction

R.-Z. Qiu, Su-Peng Kou, Z.-X. Hu, Xin Wan, and S. Yi
Phys. Rev. A 83, 063633 – Published 28 June 2011

Abstract

We investigate fast rotating quasi-two-dimensional dipolar Fermi gases in the quantum Hall regime. By tuning the direction of the dipole moments with respect to the z axis, the dipole-dipole interaction becomes anisotropic in the x-y plane. For a soft confining potential we find that, as we tilt the angle of the dipole moments, the system evolves from a ν=1/3 Laughlin state with dipoles being polarized along the z axis to a series of ground states characterized by distinct mean total angular momentum, and finally to an anisotropic integer quantum Hall state. During the transition from the fractional regime to the integer regime, we find that the density profile of the system exhibits crystal-like structures. We map out the ground states as a function of the tilt angle and the confining potential, revealing the competition of the isotropic confining potential and both the isotropic and anisotropic components of the dipole-dipole interaction.

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  • Received 7 April 2011

DOI:https://doi.org/10.1103/PhysRevA.83.063633

©2011 American Physical Society

Authors & Affiliations

R.-Z. Qiu1, Su-Peng Kou2, Z.-X. Hu3, Xin Wan4, and S. Yi1

  • 1Key Laboratory of Frontiers in Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 2Department of Physics, Beijing Normal University, Beijing 100875, China
  • 3Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA
  • 4Zhejiang Institute of Modern Physics, Zhejiang University, Hangzhou 310027, China

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Issue

Vol. 83, Iss. 6 — June 2011

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