单原子验证速度和成本之间的最佳权衡,用于快捷方式的adiabaticity
J-W Zhang1, J-T Bu2,3, J C Li1,4
1Research Center for Quantum Precision Measurement, Guangzhou Institute of Industry Technology, Guangzhou 511458, China.
Physical review letters
|June 10, 2024
概括
快捷捷径的增益电平度加快量子处理,但面临的速度和成本的权衡. 我们在s参数化相位空间中发现了这种权衡的新,紧密的边界,在超冷离子实验中得到验证.
科学领域:
- 量子信息处理 量子信息处理
- 量子动力学 量子动力学是什么?
- 原子物理 原子物理
背景情况:
- 与传统的亚亚电流程相比,对亚亚电流的快捷方式 (STA) 提供了更快的量子动力学.
- 在STA的一个关键挑战是操作速度和控制场的能量成本之间的权衡.
- 这种权衡的现有界限不能完全捕捉速度和成本之间的相互作用.
研究的目的:
- 理论上提出和实验验证一种新的,优化的权衡,限制速度和能源成本之间的快捷方式到adiabaticity.
- 探索s参数化相空间在这种权衡的表征中的作用.
- 为了研究这种权衡对不同初始量子状态的适用性.
主要方法:
- 在s参数化相空间内结合的新权衡的理论提议.
- 使用单个超冷^{40}Ca^{+}离子在波陷中的实验实施.
- 执行兰道-泽纳模型来研究光谱差距对速度和成本的影响.
主要成果:
- 在动态速度和能量成本之间提出了一个新的,紧密优化的权衡,并经过实验验证.
- 建议的权衡被证明是紧张的,无论是最初的自身状态和热平衡状态.
- 该研究证实了量子速度限制和能量成本是由兰道-泽纳模型中的光谱差距控制的.
结论:
- 这些发现提供了更深入的理解,在短途到adiabaticity的基本约束.
- 这项研究强调了未充分利用的s参数化相空间在量子控制中的潜力.
- 这项工作为设计更快,更节能的量子操作提供了洞察力.
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