Local mapping of detector response for reliable quantum state estimation.

Abstract:

:Improved measurement techniques are central to technological development and foundational scientific exploration. Quantum physics relies on detectors sensitive to non-classical features of systems, enabling precise tests of physical laws and quantum-enhanced technologies including precision measurement and secure communications. Accurate detector response calibration for quantum-scale inputs is key to future research and development in these cognate areas. To address this requirement, quantum detector tomography has been recently introduced. However, this technique becomes increasingly challenging as the complexity of the detector response and input space grow in a number of measurement outcomes and required probe states, leading to further demands on experiments and data analysis. Here we present an experimental implementation of a versatile, alternative characterization technique to address many-outcome quantum detectors that limits the input calibration region and does not involve numerical post processing. To demonstrate the applicability of this approach, the calibrated detector is subsequently used to estimate non-classical photon number states.

journal_name

Nat Commun

journal_title

Nature communications

authors

Cooper M,Karpiński M,Smith BJ

doi

10.1038/ncomms5332

subject

Has Abstract

pub_date

2014-07-14 00:00:00

pages

4332

issn

2041-1723

pii

ncomms5332

journal_volume

5

pub_type

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