克尔猫量子位的稳定和运行
A Grimm1,2, N E Frattini3, S Puri4
1Department of Applied Physics, Yale University, New Haven, CT, USA. alexander.grimm@psi.ch.
Nature
|August 14, 2020
概括
研究人员使用施罗丁格猫状态创建了强大的量子位,显著改善了连贯时间,并使量子计算和通信的运算更快.
科学领域:
- 量子信息科学
- 超导电路
- 量子光学
背景情况:
- 施罗丁格猫状态,不同经典状态的量子叠加,对于量子计量学,通信和计算至关重要.
- 在连贯状态的叠加中编码量子位提供了对相反错误的保护,但实际实现在状态稳定和快速控制方面面临挑战.
研究的目的:
- 通过实验证明一种产生和稳定施罗丁格猫状态的方法.
- 提高这些状态中编码的防错量子比特的稳定性和控制性.
主要方法:
- 在超导微波共振器中利用了克尔非线性和单模压缩之间的相互作用.
- 实施稳定技术以保持高度兴奋的施罗丁格猫状态的完整性.
主要成果:
- 与单光子福克状态编码相比,稳定量子位的横向放松时间显著增加 (超过一个数量级).
- 在时间尺度上表现出单量子比特门操作, 比最短的连贯时间快60倍.
- 在稳定下成功执行保护量子位的单次读取.
结论:
- 这种方法有效地产生和稳定了施罗丁格猫状态,增强了量子比特的一致性,并实现了快速的量子控制.
- 这些稳定的宏观状态为强大的量子信息处理提供了一个有前途的平台,
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