微型表面电极离子阱加热率的测量

发布时间：2018-05-09 22:15

本文选题：量子计算 + 离子阱　；参考：《中国科学院大学(中国科学院武汉物理与数学研究所)》2017年硕士论文

【摘要】：根据热力学定律,经典计算机的计算过程是不可逆的,其能耗问题很难得到进一步的解决。经典计算机经过五代的发展,要想进一步升级已经是极其困难。而量子计算的过程是可逆的,它在解决某些特别的问题上体现出了经典计算机难以比拟的优势,也给计算机的发展带来了新的希望,因此被众多物理学家所关注。在当前发展比较好的量子计算机物理体系中,可扩展的微型表面电极离子阱由于克服了线形离子阱体系中量子比特扩展性差的缺点而被众多实验物理学家所关注。这种结构的离子阱通过现在精密的加工工艺,将各个微小的电极镶嵌到一个绝缘材料表面上,可以实现离子阱系统的各种功能。本文主要概括了基于微型表面电极离子阱的一些实验成果,包括离子阱系统的搭建,离子的囚禁和冷却,离子微运动补偿和加热率的测量。具体工作如下;1.完成离子阱系统的搭建,并找到囚禁离子荧光信号。2.将离子几乎冷却到Doppler冷却温度的极限,通过LabVIEW程序精确控制囚禁场和激光频率。完成离子加热率的测量,并且分析了离子数、射频功率和离子的囚禁位置对加热率的影响。3.建立了基于赝势的离子热传导模型,对离子热传导过程中离子动能的周期和频谱进行了分析。
[Abstract]:According to the law of thermodynamics, the calculation process of classical computer is irreversible, and the problem of energy consumption is difficult to be solved further. After the development of five generations, it is very difficult to upgrade the classical computer. The process of quantum computing is reversible. It shows the incomparable advantages of classical computer in solving some special problems, and also brings new hope to the development of computer, so it has been paid attention to by many physicists. In the recently developed quantum computer physics system, the extensible micro-surface electrode ion trap has been paid much attention by many experimental physicists for overcoming the shortcoming of poor quantum bit expansibility in the linear ion trap system. This kind of ion trap can realize all kinds of functions of ion trap system by inserting each tiny electrode onto an insulating material surface through the present precise processing technology. In this paper, some experimental results based on micro-surface electrode ion trap are summarized, including the construction of ion trap system, ion trapping and cooling, ion micro-motion compensation and measurement of heating rate. The specific work is as follows. The ion trap system was constructed and the trapped ion fluorescence signal. 2. 2 was found. The ion is almost cooled to the limit of Doppler cooling temperature, and the trapping field and laser frequency are accurately controlled by LabVIEW program. The effect of ion number, RF power and ion trapping position on the heating rate was analyzed. The ionic heat conduction model based on pseudopotential is established, and the period and spectrum of ionic kinetic energy in the process of ionic heat conduction are analyzed.
【学位授予单位】：中国科学院大学(中国科学院武汉物理与数学研究所)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP38

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