权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Synthesis of Quantum States

量子态的合成

基本信息

批准号：
EP/N035097/1
负责人：
Alastair Kay
金额：
$ 10.52万
依托单位：
Royal Holloway University of London
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2016
资助国家：
英国
起止时间：
2016 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FN035097%2F1
关键词：
Synthesis Quantum States

项目摘要

Microelectronics and lasers, two of the major technologies underpinning the information age, are but comparatively rudimentary applications of the theory of Quantum Mechanics. A major drive of current research is to realise the full potential of a fully quantum-derived information age.One framework to express these futuristic technologies is Quantum Information, which describes their operation simply in terms of an underlying quantum state, and manipulations that have to be performed on it. Different quantum states yield different protocols.Existing protocols rely on only a very small set of states, and much experimental effort is expended in producing high quality versions of these states. However, production is often specified in terms of a complex sequence of operations. In this research, we will study a more natural production method wherein the synthesis of an appropriate quantum state is embedded in the natural properties of the system. This will mean that future experiments, aimed at building new quantum technologies, will be able to initialise themselves with minimal experimental effort, and in an easily repeated way.This technique is already known to work in specific situations (known as "Perfect state transfer"), and has already been experimentally implemented. Our task is to extend this special case into a broader concept that can be applied to any quantum information protocol. In practice, this means concentrating on the production of those small number of specific states that most protocols are based on, but also means that a characterisation of the states that can be produced can drive new theory - if we produce a particular state, what can be done with it?This theoretical concept could facilitate a far more rapid adoption of quantum technologies than would otherwise be possible. Specifying a desired functionality is one thing; laboratory realisation is another due to the manifold external influences collectively known as noise or decoherence. These corrupt the perfect concept, meaning that the final product is not the desired one. The final part of this project will study how those effects may be mitigated through the use of further engineering of the system, and by encoding the desired functionality into a form of error correcting code. Ultimately, the hope is that this decoherence might be used to engineer a difference range of states from those which one would be able to access without it, turning unwanted aspect into an essential feature.

微电子学和激光是支撑信息时代的两项主要技术，但它们都是量子力学理论的比较初级的应用。当前研究的一个主要驱动力是实现完全量子衍生的信息时代的全部潜力。表达这些未来技术的一个框架是量子信息，它简单地描述了它们的操作，以及必须对它进行的操作。不同的量子状态产生不同的协议。现有的协议只依赖于非常小的一组状态，并且在产生这些状态的高质量版本中花费了大量的实验努力。然而，生产往往是一个复杂的操作序列。在本研究中，我们将研究一种更自然的生产方法，其中适当量子态的合成嵌入系统的自然属性中。这意味着未来的实验，旨在建立新的量子技术，将能够以最小的实验努力，并以一种容易重复的方式初始化自己。这种技术已经知道在特定的情况下工作（称为“完美状态转移”），并已经在实验中实现。我们的任务是将这种特殊情况扩展到一个更广泛的概念，可以应用于任何量子信息协议。在实践中，这意味着集中精力生产大多数协议所基于的少数特定状态，但也意味着可以产生的状态的特征可以推动新的理论-如果我们产生一个特定的状态，可以用它做什么？这一理论概念可以促进量子技术比其他方式更快地被采用。获得所需的功能是一回事;实验室实现是另一回事，这是由于统称为噪声或退相干的多种外部影响。这些都破坏了完美的概念，这意味着最终的产品不是理想的。本项目的最后一部分将研究如何通过使用系统的进一步工程来减轻这些影响，并将所需的功能编码为纠错码的形式。最终，希望是这种退相干可以用来设计一个不同的状态范围，从那些没有它就可以访问的状态，把不需要的方面变成一个基本特征。