A proposed testbed for detector tomography
H.B. Coldenstrodt-Ronge, J.S. Lundeen, A. Feito, B.J. Smith, W., Mauerer, Ch. Silberhorn, J. Eisert, M.B. Plenio, I.A. Walmsley
TL;DR
This paper introduces a practical approach for fully characterizing quantum measurement devices through detector tomography, enabling calibration and visualization of measurement operators for single-photon detectors and photon counters.
Contribution
It proposes an accessible experimental setup for detector tomography and a visualization method for measurement operators, advancing quantum measurement calibration.
Findings
Successful reconstruction of POVMs for the detectors
Practical experimental apparatus demonstrated
Visualization method for measurement operators developed
Abstract
Measurement is the only part of a general quantum system that has yet to be characterized experimentally in a complete manner. Detector tomography provides a procedure for doing just this; an arbitrary measurement device can be fully characterized, 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 realized experimental apparatus to perform detector tomography on them. We also present a method of visualizing the resulting measurement operators.
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