退相干通道对二维石墨烯系统内热量子相关性的影响

IF 1.5 4区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY
Zakaria Bouafia, Mourad Benzahra, Mostafa Mansour
{"title":"退相干通道对二维石墨烯系统内热量子相关性的影响","authors":"Zakaria Bouafia,&nbsp;Mourad Benzahra,&nbsp;Mostafa Mansour","doi":"10.1007/s13538-024-01585-w","DOIUrl":null,"url":null,"abstract":"<div><p>Two-dimensional graphene systems present considerable advantages for quantum information processing. Electrons within graphene possess not just spin but also additional attributes associated with their specific positions within the lattice and valley index. This study investigates how decoherence channels impact thermal quantum correlations within individual electrons in a two-dimensional graphene system, considering the electron pseudospin and valley index degrees of freedom. Using quantum metrics such as uncertainty-induced non-locality (UIN) and local quantum Fisher information (LQFI), this research evaluates skew-information and non-classical correlations among these extra degrees of freedom of electrons within the graphene system. The dynamics of the intra-particle quantum correlations in graphene’s thermal state is analyzed with respect to factors such as scattering strength, the band structure of graphene, and wavenumber operators. The findings suggest that adjusting the parameters of the graphene system holds promise for enhancing LQFI and UIN, thereby mitigating the adverse effects of increasing equilibrium temperature. Moreover, the study examines how intra-particle thermal quantum correlations evolve under various decoherence channels, including phase damping (PD), phase flip (PF), and amplitude damping (AD). It is observed that under AD and PD channels, both metrics display similar evolution, diminishing as the decoherence parameter increases, with LQFI demonstrating greater resilience compared to UIN. However, distinct behavior is observed when graphene’s thermal state undergoes the PF channel, where both metrics display symmetrical behaviors around the decoherence parameter of <span>\\(p=0.5\\)</span>.</p></div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"54 5","pages":""},"PeriodicalIF":1.5000,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Decoherence Channels Effects on Thermal Quantum Correlations Within a Two-Dimensional Graphene System\",\"authors\":\"Zakaria Bouafia,&nbsp;Mourad Benzahra,&nbsp;Mostafa Mansour\",\"doi\":\"10.1007/s13538-024-01585-w\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Two-dimensional graphene systems present considerable advantages for quantum information processing. Electrons within graphene possess not just spin but also additional attributes associated with their specific positions within the lattice and valley index. This study investigates how decoherence channels impact thermal quantum correlations within individual electrons in a two-dimensional graphene system, considering the electron pseudospin and valley index degrees of freedom. Using quantum metrics such as uncertainty-induced non-locality (UIN) and local quantum Fisher information (LQFI), this research evaluates skew-information and non-classical correlations among these extra degrees of freedom of electrons within the graphene system. The dynamics of the intra-particle quantum correlations in graphene’s thermal state is analyzed with respect to factors such as scattering strength, the band structure of graphene, and wavenumber operators. The findings suggest that adjusting the parameters of the graphene system holds promise for enhancing LQFI and UIN, thereby mitigating the adverse effects of increasing equilibrium temperature. Moreover, the study examines how intra-particle thermal quantum correlations evolve under various decoherence channels, including phase damping (PD), phase flip (PF), and amplitude damping (AD). It is observed that under AD and PD channels, both metrics display similar evolution, diminishing as the decoherence parameter increases, with LQFI demonstrating greater resilience compared to UIN. However, distinct behavior is observed when graphene’s thermal state undergoes the PF channel, where both metrics display symmetrical behaviors around the decoherence parameter of <span>\\\\(p=0.5\\\\)</span>.</p></div>\",\"PeriodicalId\":499,\"journal\":{\"name\":\"Brazilian Journal of Physics\",\"volume\":\"54 5\",\"pages\":\"\"},\"PeriodicalIF\":1.5000,\"publicationDate\":\"2024-08-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Brazilian Journal of Physics\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s13538-024-01585-w\",\"RegionNum\":4,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"PHYSICS, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Brazilian Journal of Physics","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1007/s13538-024-01585-w","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0

摘要

二维石墨烯系统在量子信息处理方面具有相当大的优势。石墨烯中的电子不仅具有自旋,还具有与其在晶格中的特定位置和谷指数相关的附加属性。考虑到电子的伪自旋和谷指数自由度,本研究探讨了退相干通道如何影响二维石墨烯系统中单个电子内部的热量子相关性。这项研究利用不确定性诱导的非位置性(UIN)和局部量子费雪信息(LQFI)等量子度量,评估了石墨烯系统内电子的这些额外自由度之间的偏斜信息和非经典相关性。研究分析了石墨烯热状态下粒子内量子相关性的动态变化与散射强度、石墨烯的带状结构和波长算子等因素的关系。研究结果表明,调整石墨烯系统的参数有望增强 LQFI 和 UIN,从而减轻平衡温度升高带来的不利影响。此外,研究还考察了粒子内热量子相关性在各种退相干通道下的演变过程,包括相位阻尼(PD)、相位翻转(PF)和振幅阻尼(AD)。研究发现,在 AD 和 PD 信道下,两个指标都显示出相似的演化,随着退相干参数的增加而减弱,与 UIN 相比,LQFI 显示出更强的恢复能力。然而,当石墨烯的热状态经历 PF 通道时,观察到了截然不同的行为,两个指标在去相干参数 \(p=0.5\)附近显示出对称的行为。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Decoherence Channels Effects on Thermal Quantum Correlations Within a Two-Dimensional Graphene System

Decoherence Channels Effects on Thermal Quantum Correlations Within a Two-Dimensional Graphene System

Two-dimensional graphene systems present considerable advantages for quantum information processing. Electrons within graphene possess not just spin but also additional attributes associated with their specific positions within the lattice and valley index. This study investigates how decoherence channels impact thermal quantum correlations within individual electrons in a two-dimensional graphene system, considering the electron pseudospin and valley index degrees of freedom. Using quantum metrics such as uncertainty-induced non-locality (UIN) and local quantum Fisher information (LQFI), this research evaluates skew-information and non-classical correlations among these extra degrees of freedom of electrons within the graphene system. The dynamics of the intra-particle quantum correlations in graphene’s thermal state is analyzed with respect to factors such as scattering strength, the band structure of graphene, and wavenumber operators. The findings suggest that adjusting the parameters of the graphene system holds promise for enhancing LQFI and UIN, thereby mitigating the adverse effects of increasing equilibrium temperature. Moreover, the study examines how intra-particle thermal quantum correlations evolve under various decoherence channels, including phase damping (PD), phase flip (PF), and amplitude damping (AD). It is observed that under AD and PD channels, both metrics display similar evolution, diminishing as the decoherence parameter increases, with LQFI demonstrating greater resilience compared to UIN. However, distinct behavior is observed when graphene’s thermal state undergoes the PF channel, where both metrics display symmetrical behaviors around the decoherence parameter of \(p=0.5\).

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
Brazilian Journal of Physics
Brazilian Journal of Physics 物理-物理:综合
CiteScore
2.50
自引率
6.20%
发文量
189
审稿时长
6.0 months
期刊介绍: The Brazilian Journal of Physics is a peer-reviewed international journal published by the Brazilian Physical Society (SBF). The journal publishes new and original research results from all areas of physics, obtained in Brazil and from anywhere else in the world. Contents include theoretical, practical and experimental papers as well as high-quality review papers. Submissions should follow the generally accepted structure for journal articles with basic elements: title, abstract, introduction, results, conclusions, and references.
×
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:481959085
Book学术官方微信