A transition-operator diagrammatic perturbation theory enables systematic construction of effective higher-order Hamiltonians in dispersive cavity and waveguide QED.
II B 7, poles may emerge ifδ j =−δ k,δ j =−δ i or δk =δ i =−δ j, which amounts to having cumulative-detuning degeneracies ∆ 0 = ∆ 2
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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.