Experimental quantum state tomography of a solid state qubit
Quantum Physics
2009-11-13 v1
Abstract
Full quantum state tomography is used to characterize the state of an ensemble based qubit implemented through two hyperfine levels in Pr3+ ions, doped into a Y2SiO5 crystal. We experimentally verify that single-qubit rotation errors due to inhomogeneities of the ensemble can be suppressed using the Roos-Moelmer dark state scheme. Fidelities above >90%, presumably limited by excited state decoherence, were achieved. Although not explicitly taken care of in the Roos-Moelmer scheme, it appears that also decoherence due to inhomogeneous broadening on the hyperfine transition is largely suppressed.
Cite
@article{arxiv.0708.0764,
title = {Experimental quantum state tomography of a solid state qubit},
author = {L. Rippe and B. Julsgaard and A. Walther and Yan Ying and S. Kröll},
journal= {arXiv preprint arXiv:0708.0764},
year = {2009}
}
Comments
5 pages, 3 figures (eps)