Witnessing non-classicality of a quantum oscillator state by coupling it to a qubit
Quantum Physics
2013-10-04 v2
Abstract
We propose a new witness operation for the non-classical character of a harmonic oscillator state. The method does not require state reconstruction. For all harmonic oscillator states that are classical, a bound is established for the evolution of a qubit which is coupled to the oscillator. Any violation of the bound can be rigorously attributed to the non-classical character of the initial oscillator state.
Keywords
Cite
@article{arxiv.1207.5012,
title = {Witnessing non-classicality of a quantum oscillator state by coupling it to a qubit},
author = {S. Agarwal and J. H. Eberly},
journal= {arXiv preprint arXiv:1207.5012},
year = {2013}
}
Comments
Figures have been updated and some new references are added