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Deutsche Physikalische Gessellschaft IOP Institute of Physics

Measuring measurement: theory and practice

A Feito1,2,5, J S Lundeen3, H Coldenstrodt-Ronge3, J Eisert4, M B Plenio1,2 and I A Walmsley3

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Recent efforts have applied quantum tomography techniques to the calibration and characterization of complex quantum detectors using minimal assumptions. In this work, we provide detail and insight concerning the formalism, the experimental and theoretical challenges and the scope of these tomographical tools. Our focus is on the detection of photons with avalanche photodiodes and photon-number resolving detectors and our approach is to fully characterize the quantum operators describing these detectors with a minimal set of well-specified assumptions. The formalism is completely general and can be applied to a wide range of detectors.


PACS

03.65.Wj State reconstruction, quantum tomography

85.60.Dw Photodiodes; phototransistors; photoresistors

03.67.Dd Quantum cryptography and communication security

Subjects

Computational physics

Electronics and devices

Optics, quantum optics and lasers

Quantum information and quantum mechanics

Dates

Issue 9 (September 2009)

Received 14 July 2009

Published 28 September 2009



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