Jelmer J. Renema, Giulia Frucci, Michiel J. A. de Dood, Richard Gill, Andrea Fiore, Martin P. van Exter
We perform quantum state reconstruction of coherent and thermal states with a detector which has an enhanced multiphoton response. The detector is based on superconducting nanowires, where the bias current sets the dependence of the click probability on the photon number; this bias current is used as tuning parameter in the state reconstruction. The nonlinear response makes our nanowire-based detector superior to the linear detectors that are conventionally used for quantum state reconstruction.
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http://arxiv.org/abs/1206.5145
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