  We present the Schmidt decomposition for arbitrary wavefunctions of two
indistinguishable bosons, extending the recent studies of entanglement or
quantum correlations for two fermion systems [J. Schliemann et al., Phys. Rev.
B {\bf 63}, 085311 (2001) and quant-ph/0012094]. We point out that the von
Neumann entropy of the reduced single particle density matrix remains to be a
good entanglement measure for two identical particles.
