Multiqubit entanglement of a general input state
Abstract
Measurement of entanglement remains an important problem for quantum information. We present the design and simulation of an experimental method for entanglement estimation for a general multiqubit state. The system can be in a pure or a mixed state, and it need not be "close" to any particular state. Our method, based on dynamic learning, does not require prior state reconstruction or lengthy optimization. Results for three-qubit systems compare favorably with known entanglement measures. The method is then extended to four- and five-qubit systems, with relative ease. As the size of the system grows the amount of training necessary diminishes, raising hopes for applicability to large computational systems.
Cite
@article{arxiv.1108.1955,
title = {Multiqubit entanglement of a general input state},
author = {E. C. Behrman and J. E. Steck},
journal= {arXiv preprint arXiv:1108.1955},
year = {2012}
}
Comments
10 pages, 9 tables, 9 figures; submitted to Phys Rev A (August 2011)