Fermion Bound States Around Skyrmions in Doped Antiferromagnets

We show the skyrmion effects in doped antiferromagnets for the uniform flux phase. The low energy effective theory of the t' - J model can be mapped onto the massive quantum electrodynamics. There exist Fermion bound states around skyrmions. For each sublattice, there exist induced fractional fermion numbers around the skyrmions. The total induced fermion number is zero due to the “canceling effect”between two sublattices with opposite charges.