Large two-atom two-photon vacuum Rabi oscillations in a high-quality cavity
Pradyumna K. Pathak, G. S. Agarwal · Physical Review A · 2004
We predict a large cooperative effect involving two-atom two-photon vacuum Rabi oscillations in a high-quality cavity. The two-photon emission occurs as a result of simultaneous deexcitation of both atoms with two-photon resonance condition ${\ensuremath{\omega}}_{1}+{\ensuremath{\omega}}_{2}\ensuremath{\approx}{\ensuremath{\omega}}_{a}+{\ensuremath{\omega}}_{b}$, where ${\ensuremath{\omega}}_{1}$,${\ensuremath{\omega}}_{2}$ are the atomic transition frequencies and ${\ensuremath{\omega}}_{a}$,${\ensuremath{\omega}}_{b}$ are the frequencies of the emitted photons. The actual resonance condition depends on the vacuum Rabi couplings. The effect can be realized either with identical atoms in a bimodal cavity or with nonidentical atoms in a single-mode cavity.