Pulsed homodyne Gaussian quantum tomography with low detection efficiency
Abstract
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 type. 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.
Cite
@article{arxiv.1301.2471,
title = {Pulsed homodyne Gaussian quantum tomography with low detection efficiency},
author = {Martina Esposito and Fabio Benatti and Roberto Floreanini and Stefano Olivares and Francesco Randi and Kelvin Titimbo and Marco Pividori and Fabio Novelli and Federico Cilento and Fulvio Parmigiani and Daniele Fausti},
journal= {arXiv preprint arXiv:1301.2471},
year = {2014}
}