Multipartite Entanglement and Global Information
Abstract
We investigate the entanglement properties of pure quantum states describing qubits. We characterize all multipartite states which can be maximally entangled to local auxiliary systems using controlled operations. A state has this property iff one can construct out of it an orthonormal basis by applying independent local unitary operations. This implies that those states can be used to encode locally the maximum amount of bits. Examples of these states are the so--called stabilizer states, which are used for quantum error correction and one--way quantum computing. We give a simple characterization of these states and construct a complete set of commuting unitary observables which characterize the state uniquely. Furthermore we show how these states can be prepared and discuss their applications.
Cite
@article{arxiv.0808.3862,
title = {Multipartite Entanglement and Global Information},
author = {C. Kruszynska and B. Kraus},
journal= {arXiv preprint arXiv:0808.3862},
year = {2013}
}