We can apply Heisenberg's uncertainty principle (between energy and time) to the Big Bang. In early universe, at moment t, no energies below h/t were possible in principle because there was not enough time for such low energies to manifest. That minimal energy defines a minimal temparature which is about Thup=Tplank/t (t measured in plank units) At the same time, actual temparature of the universe descreased as 1/sqrt(t). As actual Temperature decreased slower then Thup, very soon T>Thup and actual particles appeared from the foam. Is that logic correct?