All states are nonclassical: entanglement of joint statistics
Quantum Physics
2016-11-22 v2
Abstract
Joint measurements of two observables reveal that every state is nonclassical, with the only trivial exception of the state with density matrix proportional to the identity. This naturally includes states considered universally as classical-like, such as SU(2) and Glauber coherent states. We show that this holds because we can always find a joint measurement whose statistics is not separable.
Keywords
Cite
@article{arxiv.1606.01478,
title = {All states are nonclassical: entanglement of joint statistics},
author = {Alfredo Luis},
journal= {arXiv preprint arXiv:1606.01478},
year = {2016}
}
Comments
4 pages, no figures