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Title: How noise affects quantum detector tomography

We determine the full photon number response of a NbN superconducting nanowire single photon detector via quantum detector tomography, and the results show the separation of linear, effective absorption efficiency from the internal detection efficiencies. In addition, we demonstrate an error budget for the complete quantum characterization of the detector. We find that for short times, the dominant noise source is shot noise, while laser power fluctuations limit the accuracy for longer timescales. The combined standard uncertainty of the internal detection efficiency derived from our measurements is about 2%.
Authors:
; ; ;  [1] ; ; ;  [2]
  1. Huygens Kamerlingh-Onnes Laboratory, Leiden University, Niels Bohrweg 2, 2333 CA Leiden (Netherlands)
  2. Istituto di Fotonica e Nanotecnologie (IFN), CNR, via Cineto Romano 42, 00156 Roma (Italy)
Publication Date:
OSTI Identifier:
22492779
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 118; Journal Issue: 13; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABSORPTION; ACCURACY; DETECTION; EFFICIENCY; ERRORS; FLUCTUATIONS; LASERS; NIOBIUM NITRIDES; NOISE; PHOTONS; TOMOGRAPHY