西班牙ICFO中心 Dr. Marc Olivier Renou 学术报告

来源:信息科学与技术学院  作者:罗明星  日期:2021-03-18  点击数:268
报告题目(Title): Network Nonlocality via Rigidity of Token-Counting and Color-Matching

报告专家(Speaker): Dr Marc Olivier Renou, ICFO, Spain

报告时间(Time):2021年3月24, 16:30-17:30am (Monday)
腾讯会议:528 147 618
主持人(Chair):  Prof. Ming-Xing Luo(罗明星)


内容提要(Outline of the Talk):

Network Nonlocality via Rigidity of Token-Counting and Color-Matching

Some entangled quantum state correlations cannot be reproduced classically. Such correlations are called Nonlocal. This notion extendes to Network Nonlocality by considering several entangled states shared in a network. Here, we introduce two families of strategies to produce network nonlocal correlations. In the first one, called Token-Counting (TC), each source distributes a fixed number of tokens and each party counts the received tokens number. In the second one, called Color-Matching (CM), each source takes a color and a party checks if the color of neighboring sources match. Using graph theoretic tools and Finner's inequality, we show that TC and CM distributions are rigid in many networks: there is essentially a unique classical strategy to simulate such correlations. Using this rigidity property, we show that certain quantum TC and CM strategies produce correlations that cannot be produced classicality. This leads us to several examples of Network Nonlocality without input. These examples involve creation of coherence throughout the whole network, a fingerprint of genuine forms of Network Nonlocality.

You may download from

https://arxiv.org/abs/2011.02769






报告人简介(Short Biography of the Speaker):


Dr. Marc Olivier Renou is a Postdoc at ICFO, Spain. He received his PhD from University of Geneva in June 2018  advised by Prof. Nicolas Gisin. He is focused on nonlocality of quantum entanglement or entangled networks. His work has been published in journals including PRL and PRA.