Two-qubit interactions in two spatial dimensions in silicon

旨在通过使用量子校正协议实现容错的量子计算平台需要高量子比特连接。对于表面代码，最具容错性的量子纠错协议，量子比特将需要与位于二维阵列中的最近邻居进行可控的相互作用。在这个PHD项目中，你将致力于首次在硅自旋量子比特设备的两个空间维度中演示两个量子比特的相互作用。硅中的电子自旋量子比特正在巩固其作为构建可扩展高保真量子处理器的领先候选者的地位，因为最近的几个演示表明，单量子比特门和两量子比特门的保真度超过了容错阈值的要求。然而，到目前为止，所有的设备都只显示了一维交互。在这个博士项目中，你将设计和验证工业制造的硅设备，它将允许你使用2D阵列中相邻自旋之间的自旋-自旋交换相互作用来在硅中实现两个量子比特门。该项目的积极成果将促进容错硅基量子处理器的发展。

Quantum computing platforms that aim to become fault-tolerant via the use of quantum correction protocols require high qubit connectivity. For the surface code, the most forgiving quantum error correction protocol, qubits will need to interact controllably with nearest neighbours located in a two-dimensional array.In this PhD project, you will work towards demonstrating for the first time two-qubit interactions in two spatial dimensions in silicon spin qubit devices. Electron spin qubits in silicon are consolidating their position as a leading candidate to build scalable high-fidelity quantum processors since several recent demonstrations have shown single- and two-qubit gate fidelities exceeding the requirements for fault tolerant thresholds. However, all devices up to now have shown interactions only in 1d. In this PhD project, you will design and validate industry-manufactured silicon devices that will allow you to use spin-spin exchange interaction between neighbour spins in a 2d array to implement two-qubit gates in silicon. A positive outcome of this project will facilitate the development of fault-tolerant silicon-based quantum processors.