Estimating entanglement of unknown states
Quantum Physics
2007-05-23 v2 Strongly Correlated Electrons
Abstract
The experimental determination of entanglement is a major goal in the quantum information field. In general the knowledge of the state is required in order to quantify its entanglement. Here we express a lower bound to the robustness of entanglement of a state based only on the measurement of the energy observable and on the calculation of a separability energy. This allows the estimation of entanglement dismissing the knowledge of the state in question.
Cite
@article{arxiv.quant-ph/0605155,
title = {Estimating entanglement of unknown states},
author = {Daniel Cavalcanti and Marcelo O. Terra Cunha},
journal= {arXiv preprint arXiv:quant-ph/0605155},
year = {2007}
}
Comments
3 pages, 1 figure. Comments welcome. V2: references updated. Accepted version by Applied Physics Letters