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arXiv 2202.09986math.NAcs.NAquant-ph
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一维量子三体问题束缚态的等几何分析

Isogeometric Analysis of Bound States of a Quantum Three-Body Problem in 1D

Quanling Deng

摘要:

在本文中,我们开始了量子三体问题的等几何分析(IGA)研究,众所周知,该问题很难解决。在IGA中,我们用B样条基函数的线性组合来表示波函数,并将问题转化为矩阵本征值问题来求解。本征值给出本征态能量,而本征向量给出导致本征态的B样条的系数。等几何法或其他基于有限元法的分析的主要困难在于缺乏边界条件和大量的自由度的准确性。对于一个典型的具有吸引相互作用的多体问题,存在束缚态和散射态,其中束缚态具有负的本征值。我们专注于束缚态,并从一个两体问题的分析开始。我们通过各种数值实验表明,IGA提供了一个很有前途的技术来解决三体问题。

英文摘要:

In this paper, we initiate the study of isogeometric analysis (IGA) of a quantum three-body problem that has been well-known to be difficult to solve. In the IGA setting, we represent the wavefunctions by linear combinations of B-spline basis functions and solve the problem as a matrix eigenvalue problem. The eigenvalue gives the eigenstate energy while the eigenvector gives the coefficients of the B-splines that lead to the eigenstate. The major difficulty of isogeometric or other finite-element-method-based analyses lies in the lack of boundary conditions and a large number of degrees of freedom for accuracy. For a typical many-body problem with attractive interaction, there are bound and scattering states where bound states have negative eigenvalues. We focus on bound states and start with the analysis for a two-body problem. We demonstrate through various numerical experiments that IGA provides a promising technique to solve the three-body problem.

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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