Fractionalization via Z(2) gauge fields at a cold-atom quantum Hall transition.

  title={Fractionalization via Z(2) gauge fields at a cold-atom quantum Hall transition.},
  author={Yafis Barlas and Kun Yang},
  journal={Physical review letters},
  volume={106 17},
  • Y. Barlas, Kun Yang
  • Published 30 November 2010
  • Physics, Medicine
  • Physical review letters
We study a single species of fermionic atoms in an "effective" magnetic field at total filling factor ν(f)=1, interacting through a p-wave Feshbach resonance, and show that the system undergoes a quantum phase transition from a ν(f)=1 fermionic integer quantum Hall state to ν(b)=1/4 bosonic fractional quantum Hall state as a function of detuning. The transition is in the (2+1)D Ising universality class. We formulate a dual theory in terms of quasiparticles interacting with a Z(2) gauge field… 
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