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影子断层扫描与N-可表示性条件的测量较少

Irma Avdic¹, David A Mazziotti¹

¹Department of Chemistry and The James Franck Institute, The University of Chicago, Chicago, Illinois 60637, USA.

Physical review letters

|June 15, 2024

概括

这项研究引入了使用经典影子断层扫描进行量子多体模拟的新算法. 它显著减少了准确确定近期量子设备上的量子状态和属性的测量要求.

科学领域:

量子信息科学量子信息科学
计算量子物理计算量子物理
量子多体系统是一个量子多体系统.

背景情况:

经典影子断层扫描为量子状态近似提供了一种具有成本效益的方法.
对复杂的量子系统进行有效的表征对于推动量子计算的发展至关重要.

研究的目的:

开发一种算法来减少多体系统影子断层扫描中的测量计数.
通过整合N-可表示性条件来加速双体减少密度矩阵 (2-RDM) 的断层扫描.

主要方法:

结合了经典的阴影与2-RDM的N-可表示性约束.
应用了算法来计算链和N2解离曲线的基态能量和2-RDM.

主要成果:

显示了所需测量次数的显著减少.
成功计算了基态能量和2-RDMs,验证了方法.

结论:

开发的算法提高了多体系统量子态断层扫描的效率.
这种方法对近期量子设备上的量子多体模拟具有重大意义.

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