The Bound of Entanglement of Superpositions with More Than Two Components
Quantum Physics
2009-11-13 v2
Abstract
A bipartite quantum state (for two systems in any dimensions) can be decomposed as a superposition of many components. For a superposition of more than two components we prove that there is a bound of the entanglement of the superposition state which can be expressed according to entanglements of its component states. Especially, if the component states are mutually bi-orthogonal, the entanglement of the superposition state can be exactly given in terms of the entanglements of the states being superposed.
Keywords
Cite
@article{arxiv.quant-ph/0701188,
title = {The Bound of Entanglement of Superpositions with More Than Two Components},
author = {Yang Xiang and Shi-Jie Xiong and Fang-Yu Hong},
journal= {arXiv preprint arXiv:quant-ph/0701188},
year = {2009}
}
Comments
5 pages;v2: version to be pulished in The European Physical Journal D