论文标题

使用顺序测量的转向的认证随机性

Certified Randomness From Steering Using Sequential Measurements

论文作者

Coyle, Brian, Kashefi, Elham, Hoban, Matty

论文摘要

可认证的随机性的产生是量子技术最有前途的应用之一。此外,量子相关性的固有非本地性使我们能够以独立的方式证明随机性,即,人们不必对所使用的设备做出假设。由于Curchod Et的工作。 Al。,单个纠缠的两量纯状态可用于产生任意数量的认证随机性。但是,获得这种随机性在实验上具有挑战性,因为它需要大量的投影和一般测量。在与设备无关的设置中遇到这些困难的动机,我们相反,考虑到某些设备被信任的单方面设备独立性的场景,而其他设备则不受信任。不对称实验设置(例如离子 - 光子网络)所激发的方案。我们展示了如何将以前工作的某些方面适应这种情况,并就可以认证的随机性数量提供理论界限。此外,在这种情况下,我们提供了无限制随机认证的协议,并提供了数值结果,以证明理想情况下的协议。最后,我们通过在几个物理平台上考虑协议的性能,从数值上测试在近期量子技术上实施该方案的可能性。

The generation of certifiable randomness is one of the most promising applications of quantum technologies. Furthermore, the intrinsic non-locality of quantum correlations allow us to certify randomness in a device-independent way, i.e. one need not make assumptions about the devices used. Due to the work of Curchod et. al., a single entangled two-qubit pure state can be used to produce arbitrary amounts of certified randomness. However, the obtaining of this randomness is experimentally challenging as it requires a large number of measurements, both projective and general. Motivated by these difficulties in the device-independent setting, we instead consider the scenario of one-sided device independence where certain devices are trusted, and others not; a scenario motivated by asymmetric experimental set-ups such as ion-photon networks. We show how certain aspects of previous work can be adapted to this scenario and provide theoretical bounds on the amount of randomness which can be certified. Furthermore, we give a protocol for unbounded randomness certification in this scenario, and provide numerical results demonstrating the protocol in the ideal case. Finally, we numerically test the possibility of implementing this scheme on near-term quantum technologies, by considering the performance of the protocol on several physical platforms.

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