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Using noise to enhance quantum computation

使用噪声增强量子计算

基本信息

批准号：
2745408
负责人：
金额：
--
依托单位：
University of Strathclyde
依托单位国家：
英国
项目类别：
Studentship
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=studentship-2745408
关键词：
Using noise enhance quantum computation

项目摘要

There are several difference models of quantum computing, including the circuit model using quantum gates, measurement based quantum computing, adiabatic quantum computing, and quantum walks. All of the theory behind these models assumes ideal noiseless operations. However, in all practical quantum hardware, interactions with the environment are unavoidable, and it is a major engineering challenge to reduce the noise, and mitigate the unwanted effects. This project takes a different approach, supported by theory showing that noise can sometimes be useful in computation. Quantum annealing is one example where cooling to very low temperatures helps to find the ground state. Quantum walks with controlled amounts of noise also retain their useful quantum properties. This project will investigate both quantum walks and quantum annealing, to characterise how and when - and how much - noise is helpful. By understanding how this works to perform useful computation, the aim is to apply the principles to other quantum computing models, and hence make use of the noise to compute, where possible. Both theoretical and computational methods will be used to model the quantum computer and noise, and the models will be tested using real quantum computers, available through the National Quantum Computing Centre, and in collaboration with experimentalists at Strathclyde.

量子计算有几种不同的模型，包括使用量子门的电路模型、基于测量的量子计算、绝热量子计算和量子行走。这些模型背后的所有理论都假设了理想的无噪音操作。然而，在所有实用的量子硬件中，与环境的相互作用是不可避免的，降低噪声，减轻有害影响是一个重大的工程挑战。这个项目采取了一种不同的方法，得到了证明噪音有时在计算中有用的理论的支持。量子退火就是一个例子，冷却到很低的温度有助于找到基态。带有可控噪声量的量子漫步也保留了它们有用的量子特性。这个项目将同时研究量子漫步和量子退火，以表征噪声如何以及何时-以及有多少-是有帮助的。通过了解这是如何工作来执行有用的计算，目的是将这些原理应用于其他量子计算模型，从而在可能的情况下利用噪声进行计算。理论和计算方法将被用于对量子计算机和噪声进行建模，这些模型将使用真实的量子计算机进行测试，这些计算机可以通过国家量子计算中心获得，并与Strathclyde的实验者合作进行测试。