Читать книгу Quantum Mechanics, Volume 3 - Claude Cohen-Tannoudji - Страница 43

As mentioned in the introduction of this chapter, the equations no longer contain labeled particles, permutations, symmetrizers and antisymmetrizers; the total number of particles N has also disappeared. We may now continue the discussion begun in § D-2 of Chapter XIV concerning the exchange terms, but in a more general way since we no longer specify the total particle number N.