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arXiv 1002.1330quant-ph
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近似稀疏多体量子哈密顿量的有效估计

Efficient estimation of nearly sparse many-body quantum Hamiltonians

A. Shabani, M. Mohseni, S. Lloyd, R. L. Kosut, H. Rabitz

摘要:

基于压缩感知的方法,我们提出了一种有效的、鲁棒的多体量子系统的哈密顿识别方法。这项工作表明,只有O(s log(d))的实验配置,由随机的本地准备和测量,可以估计的d维系统的哈密顿量,只要哈密顿量是近s-稀疏在一个已知的基础。我们数值模拟了该算法在光晶格中自旋耦合量子点和原子的三体和四体相互作用中的性能。此外,我们应用该算法来表征哈密顿精细结构和未知的系统浴相互作用。

英文摘要:

We develop an efficient and robust approach to Hamiltonian identification for multipartite quantum systems based on the method of compressed sensing. This work demonstrates that with only O(s log(d)) experimental configurations, consisting of random local preparations and measurements, one can estimate the Hamiltonian of a d-dimensional system, provided that the Hamiltonian is nearly s-sparse in a known basis. We numerically simulate the performance of this algorithm for three- and four-body interactions in spin-coupled quantum dots and atoms in optical lattices. Furthermore, we apply the algorithm to characterize Hamiltonian fine structure and unknown system-bath interactions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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