QC:SCALE - Quantum Circuits: Systematically Controlling And Linking Emitters for integrated solid state photonics platforms

QC:SCALE - 量子电路：系统地控制和链接集成固态光子平台的发射器

基本信息

批准号：
EP/W006685/1
负责人：
Krishna Coimbatore Balram
金额：
$ 109.27万
依托单位：
University of Bristol
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2022
资助国家：
英国
起止时间：
2022 至无数据
项目状态：
未结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FW006685%2F1
关键词：
QC SCALE Quantum Circuits Systematically

项目摘要

This project investigates a promising solid state architecture that could be extended to build a quantum information processor. We focus on a well understood system, the NV-defect centre in diamond. This centre has a ground state spin that is well coupled to photons such that arrays of spins coupled by low loss waveguides can be envisaged. However the solid state brings increased decoherence and spectral non-uniformity compared to atomic systems. It also brings the prospect of building spin and photonic interfaces at scale, using nanofabrication. Here we aim to individually address solid-state emitters control their spin and make them spectrally indistinguishable thus ensuring high fidelity spin quantum bits linked by waveguides on a chip. While most of the focus of the solid-state quantum photonics community has been devoted to finding an ideal solid-state emitter that exhibits atom-like properties, relatively little effort has been spent on figuring out how one can build complex opto-electronic systems around them enabling precise optical and spin control. This is especially important, given that traditional top-down semiconductor manufacturing methods cannot be directly applied to such bottom-up systems. Since a fully error corrected quantum computer will need O(1E6) qubits and even near-term noisy intermediate scale quantum (NISQ) devices need O(1E2) to demonstrate computational quantum supremacy, there is an urgent need to establish that bottom up systems employing solid state emitters can be scaled up to be competitive with top-down fabricated systems (such as those employed for linear optics and superconducting circuits). The NV- centre provides a room-temperature quantum system with optical and spin degrees of freedom that can be accessed and manipulated and this room temperature readout makes the NV- centre attractive for rapid iteration and prototyping of devices, both in the electrical and optical domain. In addition, the ready availability of high coherence NV- centres in nanodiamond form allows us to directly implement bottom-up manufacturing methods, originally developed in the bio-chemistry domain, such as precision localisation and templated self-assembly to solid state quantum optics.

该项目研究了一种有希望的固态体系结构，可以扩展以构建量子信息处理器。我们专注于钻石的NV缺失中心良好的系统。该中心的基态旋转与光子很好，因此可以设想通过低损耗波导的旋转阵列。然而，与原子系统相比，固态使变质和光谱不均匀增加。它还使用纳米制作使旋转和光子界面构建旋转和光子接口的前景。在这里，我们的目标是单独解决固态发射器控制其旋转，并使它们在频谱上无法区分，从而确保了由芯片上的波导链接的高富达自旋量子位。虽然固态量子光子学界的大多数重点都致力于找到具有原子样性能的理想固态发射极，但花费相对较少的努力来弄清楚如何构建围绕它们的复杂的光电系统实现精确的光学和旋转控制。鉴于传统的自上而下的半导体制造方法不能直接应用于此类自下而上的系统，这一点尤其重要。由于完全校正的量子计算机将需要O（1E6）量子计算机，甚至近期嘈杂的中间量表量子（NISQ）设备需要O（1E2）来证明计算量子量表至高无上，因此迫切需要建立底层上UP Systems的固定系统的底层型号可以缩放到具有竞争力的系统中（例如，这些循环范围都可以使用该系统（例如那些均可使用的循环）和强制性的循环。 NV-中心提供了一个具有光学和自旋自由度的室温量子系统，可以访问和操纵，并且该室温读数使NV-中心具有在电气和光学域中的快速迭代和原型设备的吸引力。此外，纳米座形式的高相干性NV中心的现成可用性使我们能够直接实施最初在生物化学领域中开发的自下而上的制造方法，例如精确定位和模板自组装以固态量子量子量子。