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## Main Question or Discussion Point

This Hamiltonian popped up when I was reading an article, as a reference(wikipedia): http://en.wikipedia.org/wiki/Jaynes–Cummings_model#cite_note-1

I don't understand why the Hamiltonian [itex]\hat H_{atom}[/itex] and [itex]\hat H_{int}[/itex] look the way they are. Usually we we just take a classical Hamiltonian and "operatorize" it, but I fail to see the classical counterpart for [itex]\hat H_{atom}[/itex] and [itex]\hat H_{int}[/itex]

I don't understand why the Hamiltonian [itex]\hat H_{atom}[/itex] and [itex]\hat H_{int}[/itex] look the way they are. Usually we we just take a classical Hamiltonian and "operatorize" it, but I fail to see the classical counterpart for [itex]\hat H_{atom}[/itex] and [itex]\hat H_{int}[/itex]