Читать книгу Quantum Mechanics, Volume 3 - Claude Cohen-Tannoudji - Страница 87

We now go back to the previous line of reasoning, but in a more general case where the bosons may have spins. The variational family is the set of the N-particle state vectors written in (7). The one-body potential may depend on the position r, and, at the same time, act on the spin (particles in a magnetic field gradient, for example).