Читать книгу Quantum Mechanics, Volume 3 - Claude Cohen-Tannoudji - Страница 29

To regroup the results valid for bosons and fermions in common relations, we introduce the notation:

(A-46)

with:

(A-47)

so that (A-46) is the commutator of A and B for bosons, and their anticommutator for fermions. We then have:

(A-48)

and the only non-zero combinations are:

(A-49)