A second-order BBGKY closure reproduces exact small-system neutrino dynamics about two orders of magnitude better than mean-field at polynomial cost, and predicts correlated large-N behavior.
[40]) we can decompose any arbitraryn N ×n N matrix in terms of them: O= 1 nN Tr(O) + 1 nN−1 2 Tr OΛAa ΛAa +
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Improved Approximations for Collective Neutrino Oscillations
A second-order BBGKY closure reproduces exact small-system neutrino dynamics about two orders of magnitude better than mean-field at polynomial cost, and predicts correlated large-N behavior.