一种低电路深度量子计算方法,用于核外模型
Chandan Sarma1, P D Stevenson1
1School of Mathematics and Physics, University of Surrey, Guildford, Surrey GU2 7XH UK.
概括
一个新的量子位映射策略用于变量量子Eigensolver (VQE) 使用斯莱特决定量 (SD) 而不是单粒子状态. 这简化了噪音较大的量子器件的量子电路,显示核结合能量的偏差不到4%.
科学领域:
- 核物理 核物理 核物理
- 量子计算是一种量子计算.
- 计算化学计算化学
背景情况:
- 变量量子Eigensolver (VQE) 是用于化学和物理模拟的领先量子算法.
- 目前的量子硬件限制需要高效的量子比特映射策略.
- 核外模型的计算是计算密集的.
研究的目的:
- 在核外模型计算中介绍VQE的新奇量子位映射策略.
- 提高量子模拟与噪音中等尺度量子 (NISQ) 设备的兼容性.
- 评估各种核心的新战略的表现.
主要方法:
- 开发了一个基于Slater Determinant (SD) 的量子位映射方法.
- 将该方法应用于七个核,包括同位素,,和.
- 在杂的量子模拟器和实际量子硬件上执行基态计算.
- 利用零噪声推断 (ZNE) 采用两量子比特门折叠以减轻错误.
主要成果:
- 基于SD的映射可以实现更简单的量子电路,适合NISQ设备.
- 成功模拟了比较重的原子核,如波 (22 量子比特) 和 (29 量子比特).
- 经过误差缓解后,结果显示与理论约束能相差不到4%的偏差.
- 该方法在较轻的核和双核子系统中表现出特别高的有效性.
结论:
- 拟议的基于SD的量子位映射是核物理中近期量子模拟的一个有希望的策略.
- 这种方法为研究当前量子硬件上的核结构提供了一个可行的途径.
- 这些发现为更准确,更有效的原子核量子模拟铺平了道路.
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