Multiparticle entanglement and the Schrdinger cat state using ground-state coherences
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In this paper we show how ground-state coherences and dispersive interactions of single photons with a collective system produces a variety of multiparticle entangled states and mesoscopic superpositions. Further single photons act as a carrier of information and can entangle macroscopic systems and can produce large phase shifts. Our work produces states as considered by Schrdinger in the cat-paradox, though in our case cat is replaced by the collective atomic system. 2005 Taylor & Francis Group Ltd.
