Graphene based quantum information technologies

基于石墨烯的量子信息技术

• 批准号: EP/K010050/1
• 负责人: Saverio Russo
• 金额: $ 12.78万
• 依托单位: UNIVERSITY OF EXETER
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2013
• 资助国家: 英国
• 起止时间: 2013 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FK010050%2F1
• 关键词: Graphene; based; quantum; information; technologies

Moore's law states that the computer processing power roughly doubles every 18 months, however this will not hold any longer when transistors reach the size of individual atoms. At this microscopic scale, quantum-mechanical phenomena play a central role and are no longer a simple support in improving the building blocks as is the case in most current information technologies (IT). Rather than viewing the quantum-mechanical behaviour as a problem, modern quantum information technology (QIT) uses quantum mechanics for novel schemes of storing, processing and exchanging information according to the fundamental laws of quantum physics. This additional freedom will enable future QIT to perform tasks which are not possible in standard IT. Clearly, this makes a strong case for future economic development as demonstrated for example by the Microsoft investment in creating Station-Q, which is a dedicated research centre in QIT. One of the major challenges in QIT is the "loss of information" in a relatively short time, a problem known as short quantum coherence time in semiconductor and superconducting quantum bits. Here we propose to overcome these limitations by exploiting the potential of graphene in QIT-devices. This is a deceptively simple material -one carbon atom thick- with high electrical conductivity. The relativistic charge carriers in graphene are expected to have an extraordinarily long coherence time which will allow the manipulation and transfer of information over macroscopic distances in a circuit even at room temperature. This is a property which is not found in any other known material. A prominent feature of these relativistic charge carriers is a novel charge conversion mechanism at the interface with superconductors, which spontaneously delivers spatially separated quantum-entangled pairs of electrons travelling on specularly symmetric trajectories. Pairs of entangled particles, so-called EPR pairs, play a special role and have been used as toy objects for fundamental studies. They form the core of Einstein's "spooky interaction at a distance", but also provide the basis of future applications like secure encoding, teleportation, quantum information technology and quantum computation. A solid state entangler device of electrons/holes has never been demonstrated before and its realization exploiting the unique properties of graphene is at the core of this proposal.

摩尔定律指出，计算机处理能力大约每 18 个月翻一番，但是当晶体管达到单个原子的大小时，这种情况就不再成立。在这种微观尺度上，量子力学现象发挥着核心作用，不再像当前大多数信息技术 (IT) 那样，成为改进构建模块的简单支持。现代量子信息技术（QIT）并没有将量子力学行为视为一个问题，而是根据量子物理的基本定律，使用量子力学来存储、处理和交换信息的新颖方案。这种额外的自由度将使未来的 QIT 能够执行标准 IT 中不可能完成的任务。显然，这为未来的经济发展提供了强有力的理由，微软投资创建 Station-Q（QIT 的专门研究中心）就证明了这一点。 QIT 的主要挑战之一是在相对较短的时间内“信息丢失”，这一问题在半导体和超导量子比特中被称为短量子相干时间。在这里，我们建议通过利用石墨烯在 QIT 设备中的潜力来克服这些限制。这是一种看似简单的材料——一个碳原子厚——具有高导电性。石墨烯中的相对论电荷载流子预计将具有非常长的相干时间，即使在室温下，这也将允许在电路中的宏观距离上操纵和传输信息。这是任何其他已知材料中都没有发现的特性。这些相对论电荷载流子的一个显着特征是与超导体界面处的新颖电荷转换机制，它自发地传递在镜面对称轨迹上行进的空间分离的量子纠缠电子对。成对的纠缠粒子，即所谓的 EPR 对，发挥着特殊的作用，并已被用作基础研究的玩具对象。它们构成了爱因斯坦“幽灵般的远距离相互作用”的核心，同时也为安全编码、隐形传态、量子信息技术和量子计算等未来应用提供了基础。电子/空穴的固态纠缠装置以前从未被演示过，利用石墨烯的独特性质实现它是该提案的核心。

项目成果

Molybdenum-rhenium superconducting suspended nanostructures

钼铼超导悬浮纳米结构

• DOI: 10.1063/1.4883115
• 发表时间: 2014
• 期刊: Applied Physics Letters
• 影响因子: 4
• 作者: Aziz M

Is graphene a good transparent electrode for photovoltaics and display applications?

• DOI: 10.1049/iet-cds.2015.0121
• 发表时间: 2015-11-01
• 期刊: IET CIRCUITS DEVICES & SYSTEMS
• 影响因子: 1.3
• 作者: Bointon, Thomas H.;Russo, Saverio;Craciun, Monica Felicia
• 通讯作者: Craciun, Monica Felicia

High quality monolayer graphene synthesized by resistive heating cold wall chemical vapour deposition

电阻加热冷壁化学气相沉积法合成高品质单层石墨烯

• 发表时间: 2015
• 期刊: arXiv e-prints
• 作者: Bointon Thomas H.

Large-area functionalized CVD graphene for work function matched transparent electrodes.

• DOI: 10.1038/srep16464
• 发表时间: 2015-11-09
• 期刊: Scientific reports
• 影响因子: 4.6
• 作者: Bointon TH;Jones GF;De Sanctis A;Hill-Pearce R;Craciun MF;Russo S
• 通讯作者: Russo S

High Quality Monolayer Graphene Synthesized by Resistive Heating Cold Wall Chemical Vapor Deposition.

• DOI: 10.1002/adma.201501600
• 发表时间: 2015-07-22
• 期刊: Advanced materials (Deerfield Beach, Fla.)
• 作者: Bointon TH;Barnes MD;Russo S;Craciun MF
• 通讯作者: Craciun MF