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Homework Statement
I have problem where I need to commutate my hamiltonian H with a fermionic anihillation operator. Had H been written in terms of fermionic operators I would know how to do this, but the problem is that it describes phonon oscillations, i.e. is written in terms of bosonic operators:
H = ∑kb_k(dagger)b_k
How do I commute this with a fermionic operator?