Multi-qubit gates mediated by several strongly coupled motional modes

由几种强耦合运动模式介导的多量子位门

基本信息

批准号：
2889918
负责人：
金额：
--
依托单位：
Imperial College London
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2023
资助国家：
英国
起止时间：
2023 至无数据
项目状态：
未结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2889918
关键词：
Multi qubit gates mediated several

项目摘要

Goal of this project is to devise quantum gates for more than two qubits outside the Lamb-Dicke regime that are mediated by several motional modes. Since the coupling between an individual ion and a single motional mode decreases with the number of ions in the same potential well, even a moderate number of ions implies a substantial increase of gate time. The rst task of this project will be to extend existing schemes for entangling gates using several motional modes to make them applicable to entangling interactions outside the Lamb-Dicke regime. Since the different motional modes will show un-harmonicities and there will be un-harmonic interactions between different modes, such extensions will require suitably designed driving proles.The second task of the project will be the design of dedicated gate operations for more than two trapped ions. Whereas common gate schemes realise an overall set of pairwise entangling interactions for any number of trapped ions, the realisation of a desired gate of several qubits typically requires a full series of elementary ealisable gates. We will focus on the directly realisati of multi-qubit gates such as the Toffoli gate as well as effective tree-body and four body interactions between ions. The former goal would help to reduce the gate count of quantum algorithms; the latter goal would provide a tool-box for quantum simulation and it would help to realise topological protection of quantum information.

该项目的目标是为羔羊 - 迪克（Lamb-Dicke）政权以外的两个量子位设计量子门，这些量子是由多种运动模式介导的。由于单个离子与单个运动模式之间的耦合随着离子数量的数量减少，因此即使是中等数量的离子也意味着栅极时间大幅增加。该项目的第一个任务是扩展现有方案，以使用几种动作模式纠缠门，以使其适用于纠缠羔羊dicke政权之外的互动。由于不同的动作模式将显示出非谐调性，并且不同模式之间将进行无谐波的互动，因此此类扩展将需要适当设计的驾驶驾驶。离子。尽管通用门方案实现了任何数量的被困离子的总体成对纠缠相互作用集，但实现几个Qubits的所需门通常需要一系列基本的可靠门。我们将重点关注多量门门的直接实现，例如toffoli门，有效的树木和离子之间的四个身体相互作用。前一个目标将有助于减少量子算法的门数；后一个目标将为量子模拟提供一个工具箱，这将有助于实现量子信息的拓扑保护。