Detecting Multipartite Classical States and their Resemblances
Abstract
We study various types of multipartite states lying near the quantum-classical boundary. The class of so-called classical states are precisely those in which each party can perform a projective measurement to identify a locally held state without disturbing the global state, a task known as non-disruptive local state identification (NDLID). We introduce a new class of states called generalized-classical states which allow for NDLID when the most general quantum measurements are permitted. A simple analytic method as well as a physical criterion are presented for detecting whether a multipartite state is classical. To decide whether a state is generalized-classical, we provide a semi-definite programming algorithm which can be adapted for use in other unrelated contexts such as signal processing.
Cite
@article{arxiv.1005.4348,
title = {Detecting Multipartite Classical States and their Resemblances},
author = {Lin Chen and Eric Chitambar and Kavan Modi and Giovanni Vacanti},
journal= {arXiv preprint arXiv:1005.4348},
year = {2011}
}