The relation between tangle and local unitary invariants for pure three and four-qubit states
Quantum Physics
2014-04-22 v1
Abstract
A new form of local unitary (LU) transformation invariant is given for multi-qubit states . The general relation between tangle and the LU transformation invariant of pure three and four-qubit states is given. We find that the tangle actually is a special LU transformation invariant. Furthermore, the tangle is a important local unitary (LU) transformation invariant which is a nessesary condition for maximally multi-qubit entangled state.
Keywords
Cite
@article{arxiv.1404.4912,
title = {The relation between tangle and local unitary invariants for pure three and four-qubit states},
author = {Xin-wei Zha and Yun-Guang Zhang and Jian-Xia Qi and Hai-Yang Song},
journal= {arXiv preprint arXiv:1404.4912},
year = {2014}
}
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7 pages