The unique properties of the quantum Hall effect allow one to revisit traditional measurement circuits with a new flavour. In this paper we present the first realization of a quantum Hall Kelvin bridge for the calibration of standard resistors directly against the quantum Hall resistance. The bridge design is particularly simple and requires a minimal number of instruments. The implementation here proposed is based on the bridge-on-a-chip, an integrated circuit composed of three graphene quantum Hall elements and superconducting wiring. The accuracy achieved in the calibration of a 12 906Ω standard resistor is of a few parts in 108, at present mainly limited by the prototype device and the interferences in the current implementation, with the potential to achieve few parts in 109, which is the level of the systematic uncertainty of the quantum Hall Kelvin bridge itself.

中文翻译：

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用于电阻校准的石墨烯量子霍尔开尔文片上电桥的实现

量子霍尔效应的独特特性使人们能够以一种新的方式重新审视传统的测量电路。在本文中，我们首次实现了量子霍尔开尔文电桥，用于直接针对量子霍尔电阻校准标准电阻器。琴桥设计特别简单，需要最少数量的仪器。这里提出的实现基于片上桥接，这是一种由三个石墨烯量子霍尔元件和超导布线组成的集成电路。12 906Ω标准电阻校准达到的精度是108中的几个部分，目前主要受原型设备和当前实现中的干扰限制，有可能达到109中的几个部分，