In this paper we semiclassically calculate the quantum corrections to
the classical energy of a vortex configuration in a two-dimensional XY
antiferromagnet arising from long-wavelength antiferromagnetic spin w
aves. This is done by calculating the zero-point energy due to the ant
iferromagnetic spin waves in the presence of the vortex background. Co
pyright (C) 1996 Elsevier Science Ltd