离散量子系统中的流量时间分布:从操作协议到量子速度限制
1Department of Physics, University of Massachusetts, Boston, MA 02125, USA.
Entropy (Basel, Switzerland)
|October 28, 2025
概括
我们引入了流量时间 (TF) 分布,以测量离散系统中的量子过渡时间. 这个框架有助于优化量子控制和理解量子动力学,为实验提供了一种多功能工具.
科学领域:
- 量子力学就是量子力学.
- 量子信息科学是一种量子信息科学.
- 量子动力学就是量子动力学.
背景情况:
- 在量子系统中量化过渡时间对于控制和诊断至关重要.
- 现有的方法可能受到Zeno抑制的限制或缺乏实验性可访问性.
研究的目的:
- 为量化离散量子系统中的过渡时间提出一个通用和实验性可访问的框架.
- 引入时间流 (TF) 分布作为分析量子动力学的新工具.
主要方法:
- 流动时间 (TF) 分布是由目标状态中人口变化率定义的.
- TF分布的重建是通过在独立准备的系统上重复投射测量来实现的,避免了Zeno抑制.
- 该框架用于优化时间依赖的哈密尔顿式,分析快捷通往adiabaticity (STA) 的协议,并研究非adiabatic动态.
主要成果:
- 在单调的系统中,TF分布提供了一个明确的解释,即到达时间 (TOA) 或出发时间 (TOD).
- 基于过渡的量子速度极限 (TF-QSL) 对于封闭和开放的量子系统都被推导出来.
- 确定时间不确定性的下限,并检查脱凝效应.
结论:
- TF框架对于离散状态平台中的量子控制和诊断非常通用.
- 这种方法既提供了一个概念工具,也提供了一个实验协议,用于探测和工程量子动力学.
- 这种方法提高了我们理解和操纵量子转换的能力.
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