运行两个仅交换的量子比特并行
Mateusz T Mądzik1, Florian Luthi2, Gian Giacomo Guerreschi2
1Technology Research Group, Intel Corporation, Hillsboro, OR, USA. mateusz.madzik@intel.com.
Nature
|November 26, 2025
概括
研究人员在半导体量子点中展示了两个仅交换量子位的并行操作. 这种量子计算控制的进步保持了量子位质量,并使新的门操作成为可能,为更大的量子系统铺平了道路.
科学领域:
- 量子计算
- 半导体物理
背景情况:
- 半导体和量子点是构建大型量子计算机的领先平台.
- 精确控制量子点中的电子交换相互作用对于量子比特操纵至关重要.
- 高准确性,并发的量子操作对于最大化量子比特连贯性至关重要.
研究的目的:
- 通过使用六个量子点来证明两个仅交换量子比特的并行操作.
- 验证并行交换脉冲技术在维持量子比特控制质量的有效性.
- 展示半导体量子比特的新型量子门操作和读取方法.
主要方法:
- 使用随机基准测试 (RB) 来评估并行操作中的量子位控制.
- 在五个屏障门上实现并行脉冲序列以调节交换相互作用.
- 使用交叉基准测试 (XEB) 来描述量子系统的性能.
主要成果:
- 与顺序方法相比,交换相互作用的最大并行运行保持了量子位控制质量.
- 实现了仅用于交换量子比特的iSWAP门的第一个实验演示.
- 成功实现了充电锁定保利旋转封锁 (PSB) 读取方法.
结论:
- 并行操作技术可以适应各种基于量子点的量子位编码.
- 展示的方法提高了使用半导体平台的可扩展量子计算的可行性.
- 这项研究在控制和读取半导体量子位方面取得了重大进展.
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