Utilising novel microwave filtering techniques for improved performance in superconducting quantum devices

利用新颖的微波滤波技术提高超导量子器件的性能

• 批准号: EP/W027992/1
• 负责人: Mustafa Bakr
• 金额: $ 130.8万
• 依托单位: University of Oxford
• 依托单位国家: 英国
• 项目类别: Fellowship
• 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%2FW027992%2F1
• 关键词: Utilising; novel; microwave; filtering; techniques

The coming revolution in quantum computing technologies creates some exciting challenges for engineers and equally exciting business opportunities for existing companies and new start-ups. One of these challenges is that existing superconducting quantum computers are already overcrowded with dense wiring and bulky microwave components, there is simply limited physical space in the dilution refrigerators. Moving to the 100-1000-qubit level and beyond requires new solutions for scalable and cost-effective microwave control and measurement circuity. Simply put, the microwave control systems need to be of much lighter weight and smaller physical size than at present with a high level of integration while being cost-effective and energy efficient.Some of the critically required cryogenic microwave control components are dense wiring, attenuators, and circulators, which are used to bring control signals from the electronics into the cryostat, to allow the transmission of desired frequency bands while rejecting unwanted bands and to protect quantum processors against reflected signals and decoherence. Typically, dense wiring connections, filters and circulators occupy quite a large size in the cryostat and the number of them needed is growing rapidly as we scale up the number of qubits. For example, in order to scale to 1-million-qubit-computer, the control system would also need 1-10 million filters, circulators, and coaxial cables, occupying more than three football fields of floor space and consume roughly 40 MW of dc power (assuming no power loss associated with signal distribution). It is vital to develop miniature, low-cost, reliable, insertion loss and highly integrated microwave technologies for superconducting quantum computing for the UK to be successful in this rapidly growing sector, with a projected global market of £4B by 2024.In order to move to the 100s-qubit level and beyond, where quantum computing becomes truly useful, innovation for scalable microwave control systems is needed. A short time-window is available for the UK to invest in real-world demonstration of superconducting quantum computing. Without this, the potential for a UK researcher to lead the world in this emerging area and build strong academic and industrially facing leadership will be lost. My fellowship aims to bring modern microwave approaches to supercondcting quantum computing and demonstrate improved quantum pefromance with reduced hardware overheads and thermal loaads, paving the way to move towards 100s-qubit level, where quantum computing becomes truly useful

量子计算技术的即将到来的革命为工程师带来了一些令人兴奋的挑战，并为现有公司和新初创企业带来了同样令人兴奋的商机。这些挑战之一是，现有的超导量子计算机已经被密集的接线和笨重的微波组件人满为患，稀释冰箱中的物理空间根本有限。迁移到100-1000 QUIT级别及以上需要新的解决方案，以进行可扩展和成本效益的微波控制和测量电路。简而言之，微波控制系统的重量和物理尺寸要比目前高得多，并且具有高度的整合水平，同时具有成本效益和节能。一些迫切需要的低温微波控制组件是密集的接线，衰减器和循环，在允许频率中允许频繁的频率驱动器，以使频率允许频繁的频率，从而使频繁的频率转移到频繁的范围内，该频率是频繁的频繁的，这是频繁的频繁的频道，这些信号是频繁的频繁的，这些信号是在频繁的频率中，以使频繁的频率成为频繁的频率。反射信号和磨损的处理器。通常，密集的接线连接，过滤器和电路在低温恒温器中占相当大的尺寸，并且随着我们扩大数量的规模，所需的数量正在迅速增长。例如，为了缩放到100万Quitbit-Computer，控制系统还需要1-1亿个过滤器，电路和同轴电缆，占据了三个以上足球场地空间的足球场，并消耗了大约40兆瓦的DC功率（假设与信号分布无关）。开发微型，低成本，可靠，插入损失以及高度集成的微波技术，用于为英国在这个快速增长的行业中取得成功，预计到2024年的全球全球市场将在2024年获得4B英镑的预计。在订单中，订单以进行100s-qubit级别和超越量子计算的量子量很有用，可以进行量子计算。英国可以为超导量子计算的真实示范提供短暂的时间窗口。没有这一点，英国研究人员在这个新兴地区领导着世界并建立强大的学术和工业领导的潜力将丢失。我的奖学金旨在将现代微波处理方法带入超调节量子计算，并通过减少硬件开销和热负载来改善量子限制，从而铺平了朝100s Qubition级别的途径，量子计算变得真正有用

项目成果

Encoding optimization for quantum machine learning demonstrated on a superconducting transmon qutrit

在超导 transmon qutrit 上演示的量子机器学习编码优化

• DOI: 10.48550/arxiv.2309.13036
• 发表时间: 2023
• 作者: Cao S

Cascaded pseudoelliptic dual-mode resonator filters

级联伪椭圆双模谐振滤波器

• 发表时间: 2022
• 作者: Bakr MS

Conference Abstract - Singular Locally Propagating Azimuthal Electromagnetic Fields

会议摘要 - 奇异局部传播方位角电磁场

• 发表时间: 2023
• 作者: Bakr MS

MULTIPLEXER FOR MULTIPLEXING SIGNALS FROM A PLURALITY OF READOUT RESONATORS, AND A CIRCUIT QED APPARATUS

用于复用来自多个读出谐振器的信号的复用器以及电路QED装置

• 发表时间: 2023
• 作者: Bakr MS

The Singlet: Direct Synthesis of Pseudo-Elliptic Inline Filters With Frequency Variant Couplings

• DOI: 10.1109/tmtt.2023.3269516
• 发表时间: 2023-11
• 期刊: IEEE Transactions on Microwave Theory and Techniques
• 影响因子: 4.3
• 作者: Evaristo Musonda;M. Bakr