We address the problem of relative frequencies of singlet and triplet recombinations in a multiparticle system, which consists of spin-correlated radical ion pairs. The nonlocal swapping of spin correlations due to cross-recombinations is taken into account. It is shown that this swapping does not contribute to singlet and triplet recombination frequencies in the absence of spin evolution in the correlated pairs.
@article{arxiv.0903.0469,
title = {Spin multiplicity and entanglement swapping in radical ion recombinations},
author = {L. V. Il'ichov and S. V. Anishchik},
journal= {arXiv preprint arXiv:0903.0469},
year = {2009}
}