Publications associated with Optical Quantum Technologies


A proposed testbed for detector tomography

Journal of Modern Optics 56 (2009) 432-441

HB Coldenstrodt-Ronge, JS Lundeen, KL Pregnell, A Feito, BJ Smith, W Mauerer, C Silberhorn, J Eisert, MB Plenio, IA Walmsley

Measurement is the only part of a general quantum system that has yet to be characterised experimentally in a complete manner. Detector tomography provides a procedure for doing just this; an arbitrary measurement device can be fully characterised, and thus calibrated, in a systematic way without access to its components or its design. The result is a reconstructed POVM containing the measurement operators associated with each measurement outcome. We consider two detectors, a single-photon detector and a photon-number counter, and propose an easily realised experimental apparatus to perform detector tomography on them. We also present a method of visualising the resulting measurement operators.


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