SU(4) quantum coherence and interlayer tunneling in bilayer quantum Hall systems

  • Ezawa Z
  • Hasebe K
  • Sawada A
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We construct an effective Hamiltonian for bilayer quantum Hall ferromagnets, where the SU(4) nonlinear sigma model supports the SU(4) quantum coherence. At ν = 1 there are three independent soft waves and three basic skyrmions. At ν = 2 there exist two phases in each of which there are one soft wave and one biskyrmion. Interlayer tunneling occurs via the pseudospin soft mode not only at ν = 1 but also at ν = 2. © 2002 Elsevier Science B.V. All rights reserved.

Author-supplied keywords

  • Bilayer system
  • Macroscopic coherence
  • Quantum Hall effect
  • Skyrmion

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  • Z. F. Ezawa

  • K. Hasebe

  • A. Sawada

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