超导量子比特链上的耐噪边缘模式
Science (New York, N.Y.)
|November 17, 2022
概括
这种对称性保护了量子状态. 研究人员使用超导量子位来证明非局部Majorana边缘模式 (MEM) 抵御噪声,从而能够准确地重建它们的空间配置,并揭示了对对称性破坏相互作用的弹性.
科学领域:
- 量子信息科学
- 凝聚物质物理学
- 超导量子计算
背景情况:
- 量子系统具有固有的对称性,可以保护脆弱的量子状态免受环境的破坏.
- 测试这些对称性保护状态的抗噪强度对于实际的量子技术至关重要.
- 非局部Majorana边缘模式 (MEM) 是异国情调的准粒子,在拓量子计算中具有潜在的应用.
研究的目的:
- 在固态系统中实验研究非局部Majorana边缘模式 (MEM) 的稳定性.
- 在量子系统中探索对称性保护,环境噪声和预热之间的相互作用.
- 通过分析它们的衰变速率来重建MEM的空间形状.
主要方法:
- 使用 47 超导量子位平台实现一维的 Ising 模型.
- 系统的[公式:见文本]对称性及其相关的非局部Majorana边缘模式 (MEM) 的表征.
- 测量与MEM重叠的多量子比特保利运算符的晚期衰减率.
主要成果:
- 对于与MEM交互的多量子比特保利运算符,观察到一个统一的晚期衰减率,与单量子比特放松率相似.
- 这种衰减速率特征使得MEM的指数定位空间形状能够准确地重建.
- 这些MEM表现出对某些类型的对称破坏噪声的弹性,这归因于预热化机制.
结论:
- 对称性保护,特别是对称性,有效地保护超导量子位系统中的非局部Majorana边缘模式 (MEM).
- 观察到的MEM的噪声弹性和重建性为强大的拓量子信息处理铺平了道路.
- 这项研究为现实的固态环境中噪声和对称性保护的拓状态的复杂动态提供了关键的见解.
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