Experimental quantum tomography of a homodyne detector
File(s)
Published version
Author(s)
Grandi, S
Zavatta, A
Bellini, M
Paris, MGA
Type
Journal Article
Abstract
We suggest and demonstrate a tomographic method to characterise homodyne detectors at the quantum level. The positive operator measure associated with the detector is expanded in a quadrature basis and probed with a set of coherent states. The coefficients of the expansion are then retrieved using a least squares algorithm. Our model is general enough to describe different implementations of the homodyne setup, and it has proven capable of effectively describing the detector response to different tomographic sets. We validate the reconstructed operator measure on nonclassical states and exploit results to estimate the overall quantum efficiency of the detector.
Date Issued
2017-05-17
Date Acceptance
2017-04-25
Citation
New Journal of Physics, 2017, 19
ISSN
1367-2630
Publisher
IOP Publishing
Journal / Book Title
New Journal of Physics
Volume
19
Copyright Statement
© 2017 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. riginal content from this work may be used under the terms of the Creative Commons Attribution 3.0
licence. Any further distribution of this work must maintain attribution to the author(s)
and the title of the work, journal citation
and DOI (https://creativecommons.org/licenses/by/3.0/)
licence. Any further distribution of this work must maintain attribution to the author(s)
and the title of the work, journal citation
and DOI (https://creativecommons.org/licenses/by/3.0/)
Subjects
Science & Technology
Physical Sciences
Physics, Multidisciplinary
Physics
quantum detector tomography
homodyne detector
quantum states of light
COHERENT STATES
DENSITY-MATRIX
LIGHT
MODE
PHASE
quant-ph
Fluids & Plasmas
02 Physical Sciences
Publication Status
Published
Article Number
053015