Two-photon exchange interaction from the Dicke Hamiltonian under parametric modulation
Alexandre V. Dodonov · Physical Review A · 2018
We consider the nonstationary circuit QED architecture in which a single-mode cavity interacts with $N>1$ identical qubits, and some system parameters undergo a weak external perturbation. It is shown that in the dispersive regime one can engineer the two-photon exchange interaction by adjusting the frequency of harmonic modulation to (approximately) $2|{\mathrm{\ensuremath{\Delta}}}_{\ensuremath{-}}|$, where ${\mathrm{\ensuremath{\Delta}}}_{\ensuremath{-}}$ is the average atom-field detuning. A closed analytic description is derived for the weak atom-field coupling regime, and the system dynamics under realistic conditions is studied numerically.