全微波泄漏降低单元用于用超导传送量子比特进行量子错误校正
J F Marques1,2, H Ali1,2, B M Varbanov1
1QuTech, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, Netherlands.
Physical review letters
|July 7, 2023
概括
我们开发了一个超导量子比特的泄漏减小单元 (LRU),可以最大限度地减少量子计算中的错误. 这种方法有效地抑制了超态状态的泄漏,这对于推进量子错误校正至关重要.
科学领域:
- 量子计算是一种量子计算.
- 超导电路中的超导电路
- 量子信息科学 量子信息科学
背景情况:
- 从计算状态中最大限度地减少泄漏是多层次量子系统的重大挑战,例如超导量子比特.
- 在电路量子电力学 (cQED) 中广泛使用的超声量子比特容易泄漏到更高的能量状态,影响计算准确性.
研究的目的:
- 实验实现和扩展量子硬件高效的,全微波泄漏减少单元 (LRU) 传送器.
- 为了评估LRU在第二和第三激发的跨子状态中减少泄漏的有效性.
- 为了证明同时LRU在量子错误纠正环境中的应用.
主要方法:
- 在电路 QED 架构中,针对跨子量子位量身定制的全微波泄漏减少单元 (LRU) 的实现.
- 描述LRU性能,测量泄漏减少效率和对量子位子空间的影响.
- 在一个涉及稳定器测量的量子错误校正协议中集成和测试多个同时的LRU.
主要成果:
- 在220纳秒内,在第二和第三次激发的超声波状态中达到高达99%的泄漏减少效率.
- 证明了LRU对基本量子位子空间 (地面和第一个激发状态) 的最小影响.
- 在50个周期的重量-2稳定器测量中,在数据和辅助量子位中,以1%的范围内抑制了泄漏积累.
结论:
- 实现的LRU提供了一种有效的解决方案,用于减轻超导跨子量子比特的泄漏错误.
- 该LRU与量子错误校正方案兼容,通过减少泄漏,显著提高了它们的性能.
- 这项工作推进了高保真超导量子计算系统的实际实施.
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