We propose an optical cavity-QED scheme for the deterministic generation of polarization-entangled photon pairs that operates with high fidelity even in the bad cavity limit. The scheme is based on the interaction of an excited four-level atom with two empty optical cavity modes via an adiabatic passage process. Monte Carlo wavefunction simulations are used to evaluate the fidelity of the cavity-QED source and its entanglement capability in the presence of decoherence. In the bad cavity limit, fidelities close to one are predicted for state-of-the-art experimental parameter values.

%B Journal of Physics B: Atomic, Molecular and Optical Physics %V 41 %P 045505 %U http://stacks.iop.org/0953-4075/41/i=4/a=045505 %0 Journal Article %J Journal of Optics B: Quantum and Semiclassical Optics %D 2003 %T Gain without inversion at two symmetrical sidebands of resonance in cold free 87 Rb atoms: an experimental proposal %A V. Ahufinger %A R. Corbalán %X We propose an experiment for obtaining about 0.4% inversionless gain at the sidebands of resonance in cold free 87 Rb atoms. This gain is of the same order of magnitude as the one already observed near resonance (Kitching and Hollberg 1999 Phys. Rev. A 59 4685). %B Journal of Optics B: Quantum and Semiclassical Optics %V 5 %P 268 %U http://stacks.iop.org/1464-4266/5/i=3/a=311 %0 Journal Article %J Phys. Rev. A %D 2001 %T Generalized Einstein B coefficients for coherently driven three-level systems %A J. Mompart %A R. Corbalán %X Generalized Einstein B coefficients for coherently driven closed three-level systems are introduced by means of the quantum-jump technique. The nonreciprocity between stimulated emission and absorption for both one-photon and two-photon gain and loss processes has been studied and quantified in terms of the rates of the particular incoherent processes present in each three-level system. Some general properties of these generalized Einstein B coefficients have been found. In particular, whenever the generalized Einstein B coefficient for one-photon gain overcomes that for one-photon loss then the generalized Einstein B coefficient for two-photon loss overcomes that for two-photon gain, and vice versa. Finally, we have obtained simple analytical expressions indicating the way to maximize the asymmetry between stimulated emission and absorption coefficients either for one-photon or for two-photon processes. %B Phys. Rev. A %I American Physical Society %V 63 %P 063810 %8 May %U http://link.aps.org/doi/10.1103/PhysRevA.63.063810 %R 10.1103/PhysRevA.63.063810 %0 Journal Article %J Phys. Rev. A %D 1999 %T Giant pulse lasing in three-level systems %A J. Mompart %A R. Corbalán %A R. Vilaseca %X We propose an alternative method to Q switching for generating giant pulses of laser light in three-level media. This mehod is based on the presence of an external coherent field driving one transition to allow the accumulation of a large population inversion in the other transition without laser oscillation even in a cavity with high-Q factor. The switching off of the external coherent field causes the development of the giant pulse. Different time profiles for the switching off of the external field have been investigated. %B Phys. Rev. A %I American Physical Society %V 59 %P 3038–3043 %8 Apr %U http://link.aps.org/doi/10.1103/PhysRevA.59.3038 %R 10.1103/PhysRevA.59.3038