在原子尺度上的量子位中工程旋转轨道相互作用
Yu-Ling Hsueh1,2, Daniel Keith1,3, Yousun Chung1,3
1Silicon Quantum Computing Pty Ltd., Level 2, Newton Building, UNSW Sydney, Kensington, NSW, 2052, Australia.
Advanced materials (Deerfield Beach, Fla.)
|March 20, 2024
概括
原子在中精确的放置使自旋轨道相互作用的工程成为可能. 这种控制对于优化量子比特操作和延长量子处理器中的量子比特寿命至关重要.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 量子计算是一种量子计算.
- 材料科学 材料科学 材料科学
背景情况:
- 旋转轨道相互作用将量子比特的旋转和轨道状态联系起来,这对于量子运算至关重要,同时也是限制量子比特寿命的噪声来源.
- 虽然历史上在散装中被认为是可以忽略不计的,但最近的研究表明,由于德雷塞尔豪斯和拉什巴效应,纳米电子设备中的自旋轨道合 (SOC) 是显著的.
- 了解和控制SOC对于推进量子处理器设计和性能至关重要.
研究的目的:
- 通过原子放置来研究中自旋轨道相互作用的精确控制.
- 通过定位原子来证明设计广泛的旋转轨道合强度的能力.
- 探索局部对称性修改如何影响量子应用的自旋轨道相互作用.
主要方法:
- 在网中放置原子的理论建模和模拟.
- 基于原子配置和晶体对称性的自旋轨道合强度的分析 (Dresselhaus和Rashba).
- 计算原子位置所产生的局部对称性 (C2v,D2d,D3d).
主要成果:
- 实现了Dresselhaus和Rashba合强度的调节范围,从零到1113 × 10^-13 eV-cm.
- 证明了在特定的晶体学方向 ([110]和[111]) 上精确地放置原子,可以控制SOC.
- 表明改变原子的位置会改变局部晶体对称性,从而设计自旋轨道相互作用.
结论:
- 精确的原子放置在中提供了一种强大的方法来设计旋转轨道相互作用.
- 这种原子级控制对于优化量子比特门操作和量子计算中的连贯时间至关重要.
- 这些发现为下一代基于的量子处理器的设计提供了关键的见解.
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