>>13027288>Massive particles cannot occupy the same states.Are you retarded? Whether or not particles can occupy the same state is just a matter of commutation relations on the ladder operators. Fermions anticommute, , which implies that , hence Pauli exclusion. Bosons commute, , so there is no notion of an "exclusion principle" for bosons, massive or otherwise. In other words, in general.
I can easily define a bosonic system over a set of modes which have a free Hamiltonian , where the characteristic energy depends on the nonzero mass of the bosons. There's nothing stopping me from doing so, and states like are perfectly valid elements of the symmetrized Fock space. The question of whether or not these bosons were massive never entered the picture, ever.
