量子物质拓扑相的核磁共振量子模拟

发布时间：2018-02-07 13:53

  本文关键词： 核磁共振 量子模拟 拓扑相 拓扑量子相变 拓扑量子计算　出处：《中国科学技术大学学报》2017年02期 　论文类型：期刊论文

【摘要】：拓扑相是一类不能由经典朗道对称破缺理论描述的奇特物质态.这种态具有一些有趣的性质,如依赖于拓扑流形的基态简并度、准粒子分数统计和拓扑纠缠熵等.拓扑相的性质研究在凝聚态物理中本身具有重要意义,如促进新型材料的发现.另一方面,拓扑相提供了一种天然的无噪声介质,在容错量子计算领域也有着潜在的应用.然而,受限于当前苛刻的实验条件和可控的实验手段,在真实体系中观测并探索拓扑相的性质是一件困难的事情.量子模拟用一个可控的量子系统模拟复杂的或难以观测的物理现象,为我们研究拓扑相提供了有力手段.核磁共振体系作为量子模拟的物理实现平台之一,在多量子比特实验中具有成熟的控制技术和精确的测量手段,是一个很好的测试平台.本文首先介绍拓扑相的基本概念和性质,回顾核磁共振在量子模拟中的应用,然后讨论基于该体系完成的关于拓扑相量子模拟的几个实验工作,最后给出总结并展望此研究领域的前景.
[Abstract]:Topological phase is a kind of not by the classical Landau symmetry breaking strange matter. Lack of theoretical description of this state has some interesting properties, such as harmonic depends on the topological manifold and quasi particle degree, fractional statistics and topological entanglement entropy. The topological properties of the research has important significance in condensed matter physics itself, such as to promote new materials. On the other hand, the topological phase provides a natural medium without noise, in the field of fault tolerant quantum computation has its potential applications. However, experimental means limited to experimental conditions of the current demanding and controllable, in the system and explore the real observation of nature is a topological phase difficult. Quantum simulation is complex or difficult to observe the phenomenon of quantum physics a controllable system, which provides a powerful tool for us to study the topology. The physical simulation of nuclear magnetic resonance system as the realization of quantum One of the platform, with advanced control technology and accurate measurement method in multi qubit experiment, is a good test platform. This paper first introduces the basic concepts and properties of topological phase, review the application of NMR in quantum simulation, and then discuss the complete system based on the topological quantum phase on simulation some experimental work, finally gives the summary and outlook of this research field in the future.

【作者单位】： 北京计算科学研究中心;中国科学技术大学近代物理系中国科学院微观磁共振重点实验室;合肥微尺度物质科学国家实验室量子信息与量子科技前沿协同创新中心;
【基金】：国家重点基础研究发展(973)计划(2013CB921801) 国家自然科学基金(11375167,11425523,11661161018) 中国科学院战略先导科技专项B类(XDB01030400)资助
【分类号】：O413
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本文编号：1494532