Geometric measure of entanglement for multipartite quantum states
Quantum Physics
2007-05-23 v1
Abstract
The degree to which a pure quantum state is entangled can be characterized by the distance or angle to the nearest unentangled state. This geometric measure of entanglement, already present in a number of settings [A. Shimony, Ann. NY. Acad. Sci. 755, p.675 (1995) and H. Barnum and N. Linden, J. Phys. A: Math. Gen. 34, p.6787 (2001)], is explored for bipartite and multipartite pure and mixed states. It is determined for arbitrary two-qubit mixed states and for generalized Werner and isotropic states, and is also applied to certain multipartite mixed states.
Cite
@article{arxiv.quant-ph/0212030,
title = {Geometric measure of entanglement for multipartite quantum states},
author = {Tzu-Chieh Wei and Paul M. Goldbart},
journal= {arXiv preprint arXiv:quant-ph/0212030},
year = {2007}
}
Comments
4 pages, 3 figures