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基礎沙龍【第34期-John Charles Mcintosh Gray】


主講人:John Charles Mcintosh Gray

主題:Tensor Network Tomography

時間:2019923日星期一,上午1030

地點:沙河校區通信樓818    

主講人簡介:

Dr. John Gray is a post-doc at Imperial College London currently studying mostly digital quantum simulation for many-body systems. He recently received his PhD from University College London where he worked (with Prof. Abolfazl Bayat) on a range of topics including many-body localization and how to both measure and compute many-body entanglement measures. He has a particular interest in tensor networks and maintain two open-source libraries, 'quimb' and 'opt_einsum', that deal with manipulating and contracting tensor networks.

報告摘要:

In the NISQ era of quantum devices, verification and characterization of operation is a key task. Tomography would be the ultimate tool here but is currently impractical for more than a few qubits. We investigate using tensor networks - one of the state-of-the-art methods in terms of classically representing quantum states - to make tomography both more flexible and efficient. We apply the method to IBMQ devices to quantify the genuine entanglement generated during random circuit evolutions, in doing so benchmarking their performance.

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