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Quantum information has reached a stage where real-world applications stimulate an intense research for the implementation of reliable and practical protocols for quantum communication and information processing. The implementation of such protocols, though, requires distributing quantum correlations (entanglement) among a number of degrees of freedom (modes) increasing with the complexity of the...
We use a modified Hanbury Brown-Twiss set-up based on two-photon absorption to study second-order coherence of parametric fluorescence at the femtosecond scale. Characterizations are made in the degenerate case and far away degeneracy.
Optical parametric oscillators (OPO) have been extensively used in the continuous variable quantum optics community as a resource to produce non-classical states of light, including squeezed states or entangled beams. In this paper, general description of multimode OPOs is presented, show that they are able to produce a very wide variety of multimode quantum states of light, and give techniques to...
We present here multimode OPOs as a source of multimode squeezing and multipartite entanglement of continuous-wave light beams, with applications to the engineering of multimode states of light in the spatial and spectral domains.
We introduce a new device based on self-phase locking inside an optical parametric oscillator containing two crystals. The device generates directly frequency-tunable polarization entangled beams.
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