Jonathan
Baugh
Lu, D., Xin, T., Yu, N., Ji, Z., Chen, J., Long, G., … Laflamme, R. (2016). Tomography is necessary for universal entanglement detection with single-copy observables. Physical Review Letters, 116, 230501. http://doi.org/10.1103/PhysRevLett.116.230501 (Original work published June 2016)