Proposal for a cumulant-based Bell test for mesoscopic junctions
Mesoscale and Nanoscale Physics
2011-03-22 v3 Quantum Physics
Abstract
The creation and detection of entanglement in solid state electronics is of fundamental importance for quantum information processing. We prove that second-order quantum correlations can be always interpreted classically and propose a general test of entanglement based on the violation of a classically derived inequality for continuous variables by fourth-order quantum correlation functions. Our scheme provides a way to prove the existence of entanglement in a mesoscopic transport setup by measuring higher order cumulants without requiring the additional assumption of a single charge detection
Cite
@article{arxiv.1006.4991,
title = {Proposal for a cumulant-based Bell test for mesoscopic junctions},
author = {Adam Bednorz and Wolfgang Belzig},
journal= {arXiv preprint arXiv:1006.4991},
year = {2011}
}
Comments
6 pages, 1 figure, detailed proof of weak positivity and Bell-type inequality