Priority Choice Experimental Two-Qubit Tomography: Measuring One by One All Elements of Density Matrices.

ABSTRACT: In standard optical tomographic methods, the off-diagonal elements of a density matrix ρ are measured indirectly. Thus, the reconstruction of ρ, 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 ρ 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 enta

SUBMITTER: Bartkiewicz K 

PROVIDER: S-EPMC4726363 | biostudies-literature | 2016 Jan

REPOSITORIES: biostudies-literature