We explore procedures to detect entanglement of unknown mixed states, which can be experimentally viable. The heart of the method is a hierarchy of simple feasibility problems, which provides sufficient conditions to entanglement. Our numerical investigations indicate that the entanglement is detected with a cost which is much lower than full state tomography. The procedure is applicable to both free and bound entanglement, and involves only single copy measurements.
@article{arxiv.0907.1114,
title = {Viable entanglement detection of unknown mixed states in low dimensions},
author = {Thiago O. Maciel and Reinaldo O. Vianna},
journal= {arXiv preprint arXiv:0907.1114},
year = {2010}
}