State-independent quantum state tomography by photon-number-resolving measurements
Rajveer Nehra, Aye Yadanar Win, Miller Eaton, Reihaneh Shahrokhshahi, Niranjan Sridhar, Thomas Gerrits, Adriana E. Lita, Sae Woo Nam, Olivier Pfister · Optica · 2019
The Wigner quasiprobability distribution of a narrowband single-photon state was reconstructed by quantum state tomography using photon-number-resolving measurements with transition-edge sensors (TES) at system efficiency 58(2)%. This method makes no assumptions on the nature of the measured state, save for the limitation on photon flux imposed by the TES. Negativity of the Wigner function was observed in the raw data without any inference or correction for decoherence.