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arXiv quant-ph/0203150quant-ph
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二维量子三体库仑问题

Quantum three body Coulomb problem in two dimensions

L. Hilico, B. Grémaud, T. Jonckheere, N. Billy, D. Delande

摘要:

我们研究了两个维度的三体库仑问题,并展示了如何非常准确地计算其量子特性。使用一组方便的坐标,使得只使用四个谐振子的湮灭和产生算符就可以写出薛定谔方程,这些谐振子由多达12次的各种次数耦合。详细分析了本征态的离散对称性。通过将薛定谔方程在一个方便的基组上展开,得到了二维氦原子的能级和本征态,得到了稀疏的带状矩阵,从而为精确高效的计算开辟了道路.我们给出了第一束缚里德堡系列的能级的一些非常精确的值。利用复坐标方法,我们还能够计算双激发态的能量和宽度,即高于第一电离阈值的共振。对于二维的$H^{-}$离子,只有一个束缚态。

英文摘要:

We study the three-body Coulomb problem in two dimensions and show how to calculate very accurately its quantum properties. The use of a convenient set of coordinates makes it possible to write the Schrödinger equation only using annihilation and creation operators of four harmonic oscillators, coupled by various terms of degree up to twelve. We analyse in details the discrete symmetry properties of the eigenstates. The energy levels and eigenstates of the two-dimensional helium atom are obtained numerically, by expanding the Schrödinger equation on a convenient basis set, that gives sparse banded matrices, and thus opens up the way to accurate and efficient calculations. We give some very accurate values of the energy levels of the first bound Rydberg series. Using the complex coordinate method, we are also able to calculate energies and widths of doubly excited states, i.e. resonances above the first ionization threshold. For the two-dimensional $H^{-}$ ion, only one bound state is found.

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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