Experimentally Witnessing the Quantumness of Correlations
Quantum Physics
2011-08-10 v2
Abstract
The quantification of quantum correlations (other than entanglement) usually entails laboured numerical optimization procedures also demanding quantum state tomographic methods. Thus it is interesting to have a laboratory friendly witness for the nature of correlations. In this Letter we report a direct experimental implementation of such a witness in a room temperature nuclear magnetic resonance system. In our experiment the nature of correlations is revealed by performing only few local magnetization measurements. We also compare the witness results with those for the symmetric quantum discord and we obtained a fairly good agreement.
Keywords
Cite
@article{arxiv.1104.1596,
title = {Experimentally Witnessing the Quantumness of Correlations},
author = {R. Auccaise and J. Maziero and L. C. Celeri and D. O. Soares-Pinto and E. R. deAzevedo and T. J. Bonagamba and R. S. Sarthour and I. S. Oliveira and R. M. Serra},
journal= {arXiv preprint arXiv:1104.1596},
year = {2011}
}