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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前途的固态架构，可以扩展到构建量子信息处理器。我们专注于一个很容易理解的系统，即钻石中的nv缺陷中心。该中心具有基态自旋，与光子耦合良好，因此可以设想由低损耗波导耦合的自旋阵列。然而，与原子系统相比，固态带来了更多的退相干和光谱不均匀性。它还带来了使用纳米制造大规模构建自旋和光子界面的前景。在这里，我们的目标是单独解决固态发射器控制它们的自旋，并使它们在光谱上无法区分，从而确保高保真自旋量子比特由芯片上的波导连接。虽然固态量子光子学界的大部分焦点都致力于寻找一种表现出原子状特性的理想固态发射器，但在如何围绕它们构建复杂的光电系统以实现精确的光学和自旋控制方面却花费了相对较少的精力。这一点尤其重要，因为传统的自上而下的半导体制造方法不能直接应用于这种自下而上的系统。由于完全纠错的量子计算机将需要O（1E6）个量子比特，甚至近期噪声中尺度量子（NISQ）设备也需要O（1E2）个量子比特来证明计算量子霸权，因此迫切需要建立采用固态发射体的自下而上系统可以扩大规模，以与自上而下制造的系统（例如用于线性光学和超导电路的系统）竞争。NV-中心提供了一个可以访问和操纵的具有光学和自旋自由度的室温量子系统，这个室温读数使NV-中心在电气和光学领域对设备的快速迭代和原型设计具有吸引力。此外，纳米金刚石形式的高相干NV-中心的现成可用性使我们能够直接实现自下而上的制造方法，这些方法最初是在生物化学领域开发的，例如精确定位和模板自组装到固态量子光学。