Computing resonance energies directly: method comparison for a model potential
Computing resonance energies directly: method comparison for a model potential
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直接计算共振能量:模型势的方法比较
DOI:
10.1140/epjd/s10053-021-00332-z
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Sommerfeld, Thomas
中科院分区:
文献类型:
--
作者:
Davis, Jeremy U.;Sommerfeld, Thomas
AbstractIn contrast to bound states, electronically metastable states or resonances still represent a major challenge for quantum chemistry and molecular physics. The reason lies in the embedding continuum: Bound states represent a many-body problem, while resonances represent a simultaneous scattering and many-body problem. Here we focus on so-called-methods, which treat the continuum only implicitly, but rather take the ‘decaying state’ perspective and emphasize electron correlation in the decaying state. These methods represent a natural extension of quantum chemistry into the metastable domain and are suitable for, say, modeling electron-induced reactions or resonant photo detachment. The three workhorse-methods are complex absorbing potentials, the stabilization method, and regularized analytic continuation. However, even for these three methods, making comparisons is less than straightforward as each method works best with a unique blend of electronic structure methods and basis sets. Here we address this issue by considering a model potential. For a model, we can establish a reliable reference resonance energy by using the complex scaling method and a discrete variable representation. Then, we can study the performance of the three workhorse methods as well as effects of more approximate Gaussian basis sets.Graphic Abstract
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DOI:
10.1007/978-1-4899-2326-4_14
发表时间:
1992
期刊:
The European Physical Journal D
影响因子:
--
作者:
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通讯作者:
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影响因子:
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作者:
H. Morgner
通讯作者:
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影响因子:
1.7
作者:
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通讯作者:
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DOI:
10.1140/epjd/e2016-70133-6
发表时间:
2016
期刊:
The European Physical Journal D
影响因子:
--
作者:
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通讯作者:
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DOI:
10.1103/physreva.36.2061
发表时间:
1987
期刊:
Physical review. A, General physics
影响因子:
--
作者:
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通讯作者:
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