Separability of entangled q-bit pairs
Quantum Physics
2015-06-26 v2
Abstract
The state of an entangled q-bit pair is specified by 15 numerical parameters that are naturally regarded as the components of two 3-vectors and a -dyadic. There are easy-to-use criteria to check whether a given pair of 3-vectors plus a dyadic specify a 2-q-bit state; and if they do, whether the state is entangled; and if it is, whether it is a separable state. Some progress has been made in the search for analytical expressions for the degree of separability. We report, in particular, the answer in the case of vanishing 3-vectors.
Keywords
Cite
@article{arxiv.quant-ph/9912089,
title = {Separability of entangled q-bit pairs},
author = {Berthold-Georg Englert and Nasser Metwally},
journal= {arXiv preprint arXiv:quant-ph/9912089},
year = {2015}
}