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We inspect different quantum optical setups from the viewpoint ofentanglement generation and detection. As a first step we consider a planarsemiconductor microcavity and optimize the Bell-type correlations and theirrobustness against dephasing to create strong bipartite entanglement betweenpolariton branches, which subsequently can be transfered to the emittedphotons. In a second step, in order to create multipartite entangled light, weplace the microcavity in an optical resonator driven by pump pulses with afrequency comb spectrum. For this system we show how phase matching of all combmodes can be achieved and will lead to indistinguishable scattering processescausing entanglement among every mode. Finally we demonstrate the buildup ofentanglement in the dissipative dynamics of emitters coupled to a single cavityphoton mode driven by an external laser. From a Floquet master equationapproach we find that entanglement production predominates during the first fewlaser oscillation periods.

Generation, dynamical buildup and detection of bi- and mulipartite entangled states in cavity systems