  We show that the quantum solitons occurring in theories describing a complex
scalar field in (1+1)-dimensions with a Z(N) symmetry may be identified with
sine-Gordon quantum solitons in the phase of this field. Then using both the
Euclidean thermal Green function of the two-dimensional free massless scalar
field in coordinate space and its dual, we obtain an explicit series expression
for the corresponding solitonic correlation function at finite temperature.
