The binegativity of two qubits
Quantum Physics
2017-02-13 v3
Abstract
We introduce an entanglement-related quantity that we call the binegativity. Based on numerical evidence, we conjecture that the binegativity is an entanglement measure for two-qubit states. The binegativity is compared to the concurrence and negativity, the only known entanglement measures that can be computed analytically for all two-qubit states. The ordering of entangled two-qubit mixed states induced by the binegativity is distinct from the ordering determined by previously known measures, yielding possible new insights into the structure of entangled two-qubit mixed states.
Cite
@article{arxiv.1701.02724,
title = {The binegativity of two qubits},
author = {Mark W. Girard and Gilad Gour},
journal= {arXiv preprint arXiv:1701.02724},
year = {2017}
}
Comments
7 pages, 3 figures. Comments welcome. (v3: previous versions contained an erroneous proof claiming that the binegativity is a monotone.)