Murta Gláucia, Baccari Flavio
Institut für Theoretische Physik III, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, D-40225 Düsseldorf, Germany.
Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany.
Phys Rev Lett. 2023 Oct 6;131(14):140201. doi: 10.1103/PhysRevLett.131.140201.
We consider the task of device-independent quantum state certification in a network where some of the nodes may collude and act dishonestly. We introduce the paradigm of self-testing with dishonest parties and provide a certification protocol for the Greenberger-Horne-Zeilinger state in this framework, together with robust statements about the fidelity of the shared state. We extend our results to the cluster scenario, where many subgroups of parties may collude. Our findings provide a new operational motivation for the strong definition of genuine multipartite nonlocality originally introduced by Svetlichny.
我们考虑在一个网络中进行与设备无关的量子态认证的任务，其中一些节点可能相互勾结并采取不诚实行为。我们引入了有不诚实参与方的自测试范式，并在此框架内为格林伯格 - 霍恩 - 泽林格态提供了一个认证协议，以及关于共享态保真度的稳健陈述。我们将结果扩展到簇状场景，即多个参与方子组可能相互勾结的情况。我们的发现为最初由斯韦特利奇尼引入的真正多方非局域性的强定义提供了新的操作动机。
