Priority choice experimental two-qubit tomography: measuring one by one all elements of density matrices

0463819 - FZÚ 2017 RIV GB eng J - Článek v odborném periodiku
Bartkiewicz, K. - Černoch, Antonín - Lemr, K. - Miranowicz, A.
Priority choice experimental two-qubit tomography: measuring one by one all elements of density matrices.
Scientific Reports. Roč. 6, Jan (2016), 1-7, č. článku 19610. ISSN 2045-2322. E-ISSN 2045-2322
Grant CEP: GA ČR GAP205/12/0382
Institucionální podpora: RVO:68378271
Klíčová slova: entangled photons * state tomography
Kód oboru RIV: BH - Optika, masery a lasery
Impakt faktor: 4.259, rok: 2016

In standard optical tomographic methods, the off-diagonal elements of a density matrix. are measured indirectly. Thus, the reconstruction of., even if it is based on linear inversion, typically magnifies small errors in the experimental data. Recently, an optimal tomography solution measuring all the elements of. one-by-one without error magnification has been theoretically proposed. We implemented this method for two-qubit polarization states. For comparison, we also experimentally implemented other well-known tomographic protocols, either based solely on local measurements (of, e.g., the Pauli operators and James-Kwiat-Munro-White projectors) or with mutually unbiased bases requiring both local and global measurements. We reconstructed seventeen separable, partially and maximally entangled two-qubit polarization states.
Trvalý link: http://hdl.handle.net/11104/0262919