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YMSC-BIMSA Quantum Information Seminar
Characterizing correlation within multipartite quantum systems via local randomized measurements
Characterizing correlation within multipartite quantum systems via local randomized measurements
Organizer
Speaker
You Zhou
Time
Friday, November 19, 2021 9:30 AM - 12:15 PM
Venue
JCY-1
Online
Tencent 953 7541 0477
(2024)
Abstract
Given a quantum system on many qubits split into a few different parties, how much total correlations are there between these parties? Such a quantity -- aimed to measure the deviation of the global quantum state from an uncorrelated state with the same local statistics -- plays an important role in understanding multi-partite correlations within complex quantum networks. Here, we introduce a much more experimentally accessible quantifier of total correlations, which can be estimated using only single-qubit measurements. It requires far fewer measurements than state tomography, and obviates the need to coherently interfere multiple copies of a given state. Thus we provide a tool for proving multi-partite correlations that can be applied to near-term quantum devices. Ref: ArXiv:2108.08045
Speaker Intro
Dr. You Zhou now is a Research Fellow at Centre for Quantum Technologies, National University of Singapore, after a PostDoc at Harvard University. He got his Ph.D. of quantum information from Tsinghua University, and Bachelor of EE from Zhejiang University. You Zhou is interested in quantum multipartite entanglement, quantum benchmarking, and the application to quantum many-body physics.