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arXiv:1604.06277 · Science China Physics Mechanics and Astronomy

Quantum state and process tomography via adaptive measurements

Hengyan Wang, Wenqiang Zheng, Nengkun Yu, Keren Li, Dawei Lu, Tao Xin, Carson Li, Zhengfeng Ji, David W. Kribs, Bei Zeng, Xinhua Peng, Jiangfeng Du

Published Aug 18, 2016• 31 citations
arXivHTMLPDF
DOI
10.1007/s11433-016-0287-y

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Adaptive measurements have recently been shown to significantly improve the performance of quantum state and process tomography. Adaptive tomography is especially useful in complicated experiments with low outcome generation rate, since it allows one to extract maximal information from a limited amount of data. However, the existing methods either cannot be simply applied to high-dimensional systems or are prohibitively computationally expensive. Here we propose and experimentally implement a tomographic protocol specially designed for the reconstruction of high-dimensional quantum states. The protocol shows qualitative improvement in infidelity scaling with the number of measurements and is fast enough to allow for complete state tomography of states with dimensionality up to 36.