A transition-operator diagrammatic perturbation theory enables systematic construction of effective higher-order Hamiltonians in dispersive cavity and waveguide QED.
1 (t)|γ⟩ ⟨α| ⊗ˆa† σj(ω′)ˆaσi(ω) + h.c,(C4) where the 1/2 factor stems from rule (R5) II B
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Effective Hamiltonians in Cavity and Waveguide QED from Transition-Operator Diagrammatic Perturbation Theory
A transition-operator diagrammatic perturbation theory enables systematic construction of effective higher-order Hamiltonians in dispersive cavity and waveguide QED.