  We calculate the time evolution of mean spin components and the squared
I-concurrence of two coupled large spins S. As the initial conditions we take
two cases: spin coherent states and uniform superposition states. For the spin
coherent states we have obtained the asymptotic for-mulas at S>>1 and t<<T (T
is period). We draw a conclusion that quantum computation on qudits,
represented by large spins, do not get the principal limitations on the spin
number S.
