Pulsed homodyne Gaussian quantum tomography with low detection efficiency

Pulsed homodyne quantum tomography usually requires a high detection efficiency, limiting its applicability in quantum optics. Here, it is shown that the presence of low detection efficiency ( ) does not prevent the tomographic reconstruction of quantum states of light, specifically, of Gaussian sta...

Full description

Saved in:
Bibliographic Details
Published inNew journal of physics Vol. 16; no. 4; pp. 43004 - 15
Main Authors Esposito, M, Benatti, F, Floreanini, R, Olivares, S, Randi, F, Titimbo, K, Pividori, M, Novelli, F, Cilento, F, Parmigiani, F, Fausti, D
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 07.04.2014
Subjects
Constraining
Discrimination
Efficiency
Gaussian
homodyne detection
Mathematical analysis
Mathematical models
Minimax technique
Physics
Quantum optics
quantum state reconstruction
Reconstruction
Tomography
Online AccessGet full text

Cover

More Information
Summary:Pulsed homodyne quantum tomography usually requires a high detection efficiency, limiting its applicability in quantum optics. Here, it is shown that the presence of low detection efficiency ( ) does not prevent the tomographic reconstruction of quantum states of light, specifically, of Gaussian states. This result is obtained by applying the so-called 'minimax' adaptive reconstruction of the Wigner function to pulsed homodyne detection. In particular, we prove, by both numerical and real experiments, that an effective discrimination of different Gaussian quantum states can be achieved. Our finding paves the way to a more extensive use of quantum tomographic methods, even in physical situations in which high detection efficiency is unattainable.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1367-2630
1367-2630
DOI:10.1088/1367-2630/16/4/043004