Efficient emulators for scattering using eigenvector continuation
Efficient emulators for scattering using eigenvector continuation
复制标题
使用特征向量连续进行散射的高效模拟器
DOI:
10.1016/j.physletb.2020.135719
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发表时间:
2020
影响因子:
4.4
通讯作者:
Zhang, Xilin
中科院分区:
文献类型:
--
作者:
Furnstahl, R.J.;Garcia, A.J.;Millican, P.J.;Zhang, Xilin
Eigenvector continuation (EC) has been shown to accurately and efficiently reproduce ground states for targeted sets of Hamiltonian parameters. It uses as variational basis vectors the corresponding ground-state eigensolutions from selected other sets of parameters. Here we extend the EC approach to scattering using the Kohn variational principle. We first test it using a model for S-wave nucleon-nucleon scattering and then demonstrate that it also works to give accurate predictions for non-local potentials, charged-particle scattering, complex optical potentials, and higher partial waves. These proofs-of-principle validate EC as an accurate emulator for applying Bayesian inference to parameter estimation constrained by scattering observables. The efficiency of such emulators is because the accuracy is achieved with a small number of variational basis elements and the central computations are just linear algebra calculations in the space spanned by this basis.
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