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.
@article{arxiv.1206.5145,
title = {Tomography and state reconstruction with superconducting single-photon detectors},
author = {Jelmer J. Renema and Giulia Frucci and Michiel J. A. de Dood and Richard Gill and Andrea Fiore and Martin P. van Exter},
journal= {arXiv preprint arXiv:1206.5145},
year = {2013}
}