Quantifying interference in multipartite quantum systems
Abstract
The characterization of quantum correlations is crucial to the development of new quantum technologies and to understand how dramatically quantum theory departs from classical physics. Here we systematically study single- and multiparticle interference patterns produced by general two- and three-qubit systems. From this we establish on phenomenological grounds a new type of quantum correlation for these systems, which we name quantum interference, deriving some quantifiers that are given explicitly in terms of the density matrix elements of the complete system. By using these quantifiers, we show that, contrary to our expectations, entanglement is not a required property for a composite quantum system to manifest multiparticle interference.
Cite
@article{arxiv.1911.09736,
title = {Quantifying interference in multipartite quantum systems},
author = {Rejane Alves de Brito and Bertúlio de Lima Bernardo},
journal= {arXiv preprint arXiv:1911.09736},
year = {2020}
}
Comments
20 pages, 5 figures