期刊
PHYSICS LETTERS B
卷 810, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.physletb.2020.135814
关键词
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资金
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [279384907 -SFB 1245]
- U.S. Department of Energy [DE-SC0018638, DE-AC52-06NA25396]
- European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme [758027]
- U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under the FRIB Theory Alliance award [DE-SC0013617]
First principles calculations of atomic nuclei based on microscopic nuclear forces derived from chiral effective field theory (EFT) have blossomed in the past years. A key element of such ab initio studies is the understanding and quantification of systematic and statistical errors arising from the omission of higher-order terms in the chiral expansion as well as the model calibration. While there has been significant progress in analyzing theoretical uncertainties for nucleon-nucleon scattering observables, the generalization to multi-nucleon systems has not been feasible yet due to the high computational cost of evaluating observables for a large set of low-energy couplings. In this Letter we show that a new method called eigenvector continuation (EC) can be used for constructing an efficient and accurate emulator for nuclear many-body observables, thereby enabling uncertainty quantification in multi-nucleon systems. We demonstrate the power of EC emulation with a proof-of-principle calculation that lays out all correlations between bulk ground-state observables in the few-nucleon sector. On the basis of ab initio calculations for the ground-state energy and radius in 4 He, we demonstrate that EC is more accurate and efficient compared to established methods like Gaussian processes. (C) 2020 The Author(s). Published by Elsevier B.V.
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