Quantum Process Nonclassicality
Abstract
We propose a definition of nonclassicality for a single-mode quantum-optical process based on its action on coherent states. If a quantum process transforms a coherent state to a nonclassical state, it is verified to be nonclassical. To identify nonclassical processes, we introduce a representation for quantum processes, called the process-nonclassicality quasiprobability distribution, whose negativities indicate nonclassicality of the process. Using this distribution, we derive a relation for predicting nonclassicality of the output states for a given input state. We experimentally demonstrate our method by considering the single-photon addition as a nonclassical process, and predicting nonclassicality of the output state for an input thermal state.
Cite
@article{arxiv.1302.0934,
title = {Quantum Process Nonclassicality},
author = {Saleh Rahimi-Keshari and Thomas Kiesel and Werner Vogel and Samuele Grandi and Alessandro Zavatta and Marco Bellini},
journal= {arXiv preprint arXiv:1302.0934},
year = {2013}
}
Comments
5+2 pages, 5 figures