Multi-qubit stabilizer and cluster entanglement witnesses
Quantum Physics
2009-11-13 v2
Abstract
One of the problems concerning entanglement witnesses (EWs) is the construction of them by a given set of operators. Here several multi-qubit EWs called stabilizer EWs are constructed by using the stabilizer operators of some given multi-qubit states such as GHZ, cluster and exceptional states. The general approach to manipulate the multi-qubit stabilizer EWs by exact(approximate) linear programming (LP) method is described and it is shown that the Clifford group play a crucial role in finding the hyper-planes encircling the feasible region. The optimality, decomposability and non-decomposability of constructed stabilizer EWs are discussed.
Keywords
Cite
@article{arxiv.0704.2414,
title = {Multi-qubit stabilizer and cluster entanglement witnesses},
author = {M. A. Jafarizadeh and G. Najarbashi and Y. Akbari and H. Habibian},
journal= {arXiv preprint arXiv:0704.2414},
year = {2009}
}
Comments
57 pages, 2 figures