Separable balls around the maximally mixed state for a 3-qubit system
量子物理
2007-05-23 v1
摘要
We obtain a new lower bound on the radius of the largest ball of separable unnormalized states around the identity matrix for a 3-qubit system. This also enables us to improve the corresponding lower bounds for multi-qubit systems. These bounds are approximately 5% better than the previously known ones. As a by-product, we compute the radius of the largest ball that fits into the triple projective tensor product of the unit ball in R^3.
引用
@article{arxiv.quant-ph/0601201,
title = {Separable balls around the maximally mixed state for a 3-qubit system},
author = {Roland Hildebrand},
journal= {arXiv preprint arXiv:quant-ph/0601201},
year = {2007}
}
备注
9 pages, no figures; based on quant-ph/0503194