室温下SiC中硅空位中心双量子位的量子传感

IF 8.3 1区 物理与天体物理 Q1 PHYSICS, APPLIED
Kosuke Tahara, Shin-ichi Tamura, Haruko Toyama, Jotaro J. Nakane, Katsuhiro Kutsuki, Yuichi Yamazaki, Takeshi Ohshima
{"title":"室温下SiC中硅空位中心双量子位的量子传感","authors":"Kosuke Tahara, Shin-ichi Tamura, Haruko Toyama, Jotaro J. Nakane, Katsuhiro Kutsuki, Yuichi Yamazaki, Takeshi Ohshima","doi":"10.1038/s41534-025-01011-2","DOIUrl":null,"url":null,"abstract":"<p>The silicon vacancy center in Silicon Carbide (SiC) provides an optically addressable qubit at room temperature in its spin-<span>\\(\\frac{3}{2}\\)</span> electronic state. However, optical spin initialization and readout are less efficient compared to those of spin-1 systems, such as nitrogen-vacancy centers in diamond, under non-resonant optical excitation. Spin-dependent fluorescence exhibits contrast only between <span>\\(| m=\\pm 3/2\\left.\\right\\rangle\\)</span> and <span>\\(| m=\\pm 1/2\\left.\\right\\rangle\\)</span> states, and optical pumping does not create a population difference between <span>\\(| +1/2\\left.\\right\\rangle\\)</span> and <span>\\(| -1/2\\left.\\right\\rangle\\)</span> states. Thus, operating one qubit (e.g., <span>\\(\\left\\{| +3/2\\left.\\right\\rangle ,| +1/2\\left.\\right\\rangle \\right\\}\\)</span> states) leaves the population in the remaining state (<span>\\(| -1/2\\left.\\right\\rangle\\)</span>) unaffected, contributing to background in optical readout. To mitigate this problem, we propose a sensing scheme based on duplex qubit operation in the quartet, using microwave pulses with two resonant frequencies to simultaneously operate <span>\\(\\left\\{| +3/2\\left.\\right\\rangle ,| +1/2\\left.\\right\\rangle \\right\\}\\)</span> and <span>\\(\\left\\{| -1/2\\left.\\right\\rangle ,| -3/2\\left.\\right\\rangle \\right\\}\\)</span>. Experimental results demonstrate that this approach doubles signal contrast in optical readout and improves sensitivity in AC magnetometry compared to simplex operation.</p>","PeriodicalId":19212,"journal":{"name":"npj Quantum Information","volume":"16 1","pages":""},"PeriodicalIF":8.3000,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Quantum sensing with duplex qubits of silicon vacancy centers in SiC at room temperature\",\"authors\":\"Kosuke Tahara, Shin-ichi Tamura, Haruko Toyama, Jotaro J. Nakane, Katsuhiro Kutsuki, Yuichi Yamazaki, Takeshi Ohshima\",\"doi\":\"10.1038/s41534-025-01011-2\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The silicon vacancy center in Silicon Carbide (SiC) provides an optically addressable qubit at room temperature in its spin-<span>\\\\(\\\\frac{3}{2}\\\\)</span> electronic state. However, optical spin initialization and readout are less efficient compared to those of spin-1 systems, such as nitrogen-vacancy centers in diamond, under non-resonant optical excitation. Spin-dependent fluorescence exhibits contrast only between <span>\\\\(| m=\\\\pm 3/2\\\\left.\\\\right\\\\rangle\\\\)</span> and <span>\\\\(| m=\\\\pm 1/2\\\\left.\\\\right\\\\rangle\\\\)</span> states, and optical pumping does not create a population difference between <span>\\\\(| +1/2\\\\left.\\\\right\\\\rangle\\\\)</span> and <span>\\\\(| -1/2\\\\left.\\\\right\\\\rangle\\\\)</span> states. Thus, operating one qubit (e.g., <span>\\\\(\\\\left\\\\{| +3/2\\\\left.\\\\right\\\\rangle ,| +1/2\\\\left.\\\\right\\\\rangle \\\\right\\\\}\\\\)</span> states) leaves the population in the remaining state (<span>\\\\(| -1/2\\\\left.\\\\right\\\\rangle\\\\)</span>) unaffected, contributing to background in optical readout. To mitigate this problem, we propose a sensing scheme based on duplex qubit operation in the quartet, using microwave pulses with two resonant frequencies to simultaneously operate <span>\\\\(\\\\left\\\\{| +3/2\\\\left.\\\\right\\\\rangle ,| +1/2\\\\left.\\\\right\\\\rangle \\\\right\\\\}\\\\)</span> and <span>\\\\(\\\\left\\\\{| -1/2\\\\left.\\\\right\\\\rangle ,| -3/2\\\\left.\\\\right\\\\rangle \\\\right\\\\}\\\\)</span>. Experimental results demonstrate that this approach doubles signal contrast in optical readout and improves sensitivity in AC magnetometry compared to simplex operation.</p>\",\"PeriodicalId\":19212,\"journal\":{\"name\":\"npj Quantum Information\",\"volume\":\"16 1\",\"pages\":\"\"},\"PeriodicalIF\":8.3000,\"publicationDate\":\"2025-04-05\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"npj Quantum Information\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://doi.org/10.1038/s41534-025-01011-2\",\"RegionNum\":1,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"PHYSICS, APPLIED\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"npj Quantum Information","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1038/s41534-025-01011-2","RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"PHYSICS, APPLIED","Score":null,"Total":0}
引用次数: 0

摘要

碳化硅(SiC)中的硅空位中心在室温下提供了一个自旋\(\frac{3}{2}\)电子态的光学寻址量子比特。然而,在非共振光激发下,与自旋为1的系统(如金刚石中的氮空位中心)相比,光自旋初始化和读出效率较低。自旋依赖荧光仅在\(| m=\pm 3/2\left.\right\rangle\)和\(| m=\pm 1/2\left.\right\rangle\)状态之间表现出对比,光泵浦不会在\(| +1/2\left.\right\rangle\)和\(| -1/2\left.\right\rangle\)状态之间产生种群差异。因此,操作一个量子位(例如\(\left\{| +3/2\left.\right\rangle ,| +1/2\left.\right\rangle \right\}\)状态)会使剩余状态(\(| -1/2\left.\right\rangle\))的种群不受影响,从而影响光学读出的背景。为了解决这个问题,我们提出了一种基于双量子比特操作的传感方案,使用两个共振频率的微波脉冲同时操作\(\left\{| +3/2\left.\right\rangle ,| +1/2\left.\right\rangle \right\}\)和\(\left\{| -1/2\left.\right\rangle ,| -3/2\left.\right\rangle \right\}\)。实验结果表明,该方法提高了光读出的信号对比度,提高了交流磁强计的灵敏度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Quantum sensing with duplex qubits of silicon vacancy centers in SiC at room temperature

Quantum sensing with duplex qubits of silicon vacancy centers in SiC at room temperature

The silicon vacancy center in Silicon Carbide (SiC) provides an optically addressable qubit at room temperature in its spin-\(\frac{3}{2}\) electronic state. However, optical spin initialization and readout are less efficient compared to those of spin-1 systems, such as nitrogen-vacancy centers in diamond, under non-resonant optical excitation. Spin-dependent fluorescence exhibits contrast only between \(| m=\pm 3/2\left.\right\rangle\) and \(| m=\pm 1/2\left.\right\rangle\) states, and optical pumping does not create a population difference between \(| +1/2\left.\right\rangle\) and \(| -1/2\left.\right\rangle\) states. Thus, operating one qubit (e.g., \(\left\{| +3/2\left.\right\rangle ,| +1/2\left.\right\rangle \right\}\) states) leaves the population in the remaining state (\(| -1/2\left.\right\rangle\)) unaffected, contributing to background in optical readout. To mitigate this problem, we propose a sensing scheme based on duplex qubit operation in the quartet, using microwave pulses with two resonant frequencies to simultaneously operate \(\left\{| +3/2\left.\right\rangle ,| +1/2\left.\right\rangle \right\}\) and \(\left\{| -1/2\left.\right\rangle ,| -3/2\left.\right\rangle \right\}\). Experimental results demonstrate that this approach doubles signal contrast in optical readout and improves sensitivity in AC magnetometry compared to simplex operation.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
npj Quantum Information
npj Quantum Information Computer Science-Computer Science (miscellaneous)
CiteScore
13.70
自引率
3.90%
发文量
130
审稿时长
29 weeks
期刊介绍: The scope of npj Quantum Information spans across all relevant disciplines, fields, approaches and levels and so considers outstanding work ranging from fundamental research to applications and technologies.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信