Generation of entangled photon pairs in optical cavity-QED: Operating in the bad cavity limit

In this work, we propose a cavity quantum electrodynamics (cavity-QED) implementation that deterministically generates polarization-entangled photons pairs and that presents three important features from a practical point of view: (i) it operates with high fidelity even in the bad cavity limit; (ii) it is very robust under fluctuations of the system parameters since it is based on adiabatically following an energy eigenstate; and (iii) the initial field state is the simplest in optical cavity-QED, namely the vacuum state for all cavity modes.