SOLITONS IN CHERN-SIMONS THEORIES OF NONRELATIVISTIC CPN-1 MODELS - SPIN TEXTURES IN THE QUANTUM HALL-EFFECT

Topological solitons in CPN-1 models coupled with a Chern-Simons gauge field and a Hopf term are studied both analytically and numerically. These models are low-energy effective theories for the quantum Hall ef fect (QHE) with internal degrees of freedom, like the QHE in double-la yer electron systems. These solitons correspond to skyrmions and meron s which are charged quasi-excitations in the QHE. We explicitly show t hat the CPN-1 models can be used to represent (pseudo-)spin textures i n the original Chern-Simons theory of bosonized electrons.