Semi-Measurement-Device-Independent Quantum State Tomography
Jian Li, Jiali Zhu, Jiang Gao, Zhi-Guang Pang, Qin Wang · Chinese Physics Letters · 2022
As one of the fundamental tools in the quantum information field, quantum state tomography can be utilized to reconstruct any unknown state. Usually, it needs a tomographically complete set of measurements and meantime it requires that all measurements are fully characterized. Here we propose a semi-measurement-device-independent quantum state tomography protocol, which only needs one characterized measurement and a trusted ancillary system. Furthermore, we carry out corresponding experimental demonstrations by using linear optics, and obtain the average state fidelity as high as 0.973, verifying the effectiveness of the scheme.