Optical neural network quantum state tomography

Quantum state tomography (QST) is a crucial ingredient for almost all aspects of experimental quantum information processing. As an analog the “imaging” technique in settings, QST born to be data science problem, where machine learning techniques, noticeably neural networks, have been applied extensively. We build and demonstrate optical network (ONN) photonic polarization qubit QST. The ONN equipped with built-in nonlinear activation functions based on electromagnetically induced transparency. results show that our can determine phase parameter accurately. optics are highly desired interconnections, ONN-QST may contribute realization networks inspire ideas combining artificial intelligence studies.