Unrestricted generation of pure two-qubit states and entanglement diagnosis by single-qubit tomography
J. Gonzales, P. Sánchez, Fabio J. Auccapuclla, Benton Miller, Miguel Vicente Andrés, F. De Zela · Optics Letters · 2019
We present an experimental proof-of-principle for the generation and detection of pure two-qubit states that have been encoded in degrees of freedom that are common to both classical-light beams and single photons. Our protocol requires performing polarization tomography on a single qubit from a qubit pair. The degree of entanglement in the qubit pair is measured by concurrence, which can be directly extracted from intensity measurements-or photon counting-entering single-qubit polarization tomography.