王琼瑶, 白婧, 徐露婷, 冯伟, 李新奇. 马约拉纳零能模移动引起的非绝热跃迁和粒子数宇称破坏及其检测[J]. 北京师范大学学报(自然科学版). DOI: 10.12202/j.0476-0301.2024077
引用本文: 王琼瑶, 白婧, 徐露婷, 冯伟, 李新奇. 马约拉纳零能模移动引起的非绝热跃迁和粒子数宇称破坏及其检测[J]. 北京师范大学学报(自然科学版). DOI: 10.12202/j.0476-0301.2024077
WANG Qiongyao, BAI Jing, XU Luting, FENG Wei, LI Xin-Qi. Moving Majorana-zero-mode caused nonadiabatic transition and fermion-parity violation and their detection scheme[J]. Journal of Beijing Normal University(Natural Science). DOI: 10.12202/j.0476-0301.2024077
Citation: WANG Qiongyao, BAI Jing, XU Luting, FENG Wei, LI Xin-Qi. Moving Majorana-zero-mode caused nonadiabatic transition and fermion-parity violation and their detection scheme[J]. Journal of Beijing Normal University(Natural Science). DOI: 10.12202/j.0476-0301.2024077

马约拉纳零能模移动引起的非绝热跃迁和粒子数宇称破坏及其检测

Moving Majorana-zero-mode caused nonadiabatic transition and fermion-parity violation and their detection scheme

  • 摘要: 拓扑超导体中马约拉纳零能模的移动,对拓扑量子计算具有十分重要的作用.基于微观格点模型,本文模拟了微电极操控下的多段移动以及移动过程中引起的非绝热跃迁.结果表明,多段移动可以降低非绝热跃迁概率.另外,经过准粒子激发谱的非绝热跃迁,还将诱导一对马约拉纳零能模的初始费米宇称的微弱破坏(二阶效应).本文提出了一种检测非绝热跃迁效应的方案,该方案可以同时检测因移动马约拉纳零能模引起的跃迁至激发态的概率,以及因二阶效应引起的初始费米宇称的破坏.

     

    Abstract: Moving Majorana-zero-modes (MZMs) in topological superconductors (TSC) is an important issue for the goal of topological quantum computation. Based on the microscopic lattice model, we simulate the moving of MZM in a TSC quantum wire, via multiple segments modulation scheme. The two main findings are: (i) multiple segments moving can reduce the nonadiabatic transition; (ii) the initial fermion parity will be violated (slightly) owing to the second-order effect of nonadiabatic transition, mediated by the quasiparticle spectrum. We also propose a scheme to probe the both effect.

     

/

返回文章
返回