Topological solitons in Chern-Simons theories for double-layer   fractional quantum Hall effect
  Topological excitations in Chern-Simons gauge theories which describe double-layer fractional quantum Hall effct are studied. There are two types of solitons; one is vortex and the other is nontrivial pseudospin textures which are so-called skyrmion or meron. Effective field theory which describes these solitons is derived by duality transformation. 
I.Ichinose and A.Sekiguchi