[GiNaC-list] question about quantum operator algebra

hi, I am searching for a software or library that can handle operator algebra in quantum mechanics. For example, I would like to caculate the commutator [a,H], where the Hamiltonian "H"=\epsilon a^{\dag}a, and "a" is annihilation operator for, say, an osilator. I tried GiNaC, and read much documentation, and get little clue. I wonder if there is a direct implementation of these kind of operator algebra in GiNaC. Thank you in advance.