Wavefunction matching for solving quantum many-body problems

• 成果类型: Article
• 署名作者: Elhatisari, Serdar; Bovermann, Lukas; Ma, Yuan-Zhuo; Epelbaum, Evgeny; Frame, Dillon; Hildenbrand, Fabian; Kim, Myungkuk; Kim, Youngman; Krebs, Hermann; Laehde, Timo A.; Lee, Dean; Li, Ning; Lu, Bing-Nan; Meissner, Ulf-G.; Rupak, Gautam; Shen, Shihang; Song, Young-Ho; Stellin, Gianluca
• 署名单位: Gaziantep Islam Science & Technology University; Helmholtz Association; University of Bonn; University of Bonn; Ruhr University Bochum; Michigan State University; Michigan State University; South China Normal University; Helmholtz Association; Research Center Julich; Institute for Basic Science - Korea (IBS); Sun Yat Sen University; Chinese Academy of Engineering Physics; Ivane Javakhishvili Tbilisi State University; Mississippi State University; Mississippi State University; Institute for Basic Science - Korea (IBS); Universite Paris Saclay
• 刊物名称: Nature
• ISSN/ISSBN: 0028-4514
• DOI: 10.1038/s41586-024-07422-z
• 发表日期: 2024-06-06
• 关键词: effective-field theory; renormalization-group; initio; nuclei; STATES

摘要

Ab initio calculations have an essential role in our fundamental understanding of quantum many-body systems across many subfields, from strongly correlated fermions(1-3) to quantum chemistry(4-6) and from atomic and molecular systems(7-9) to nuclear physics(10-14). One of the primary challenges is to perform accurate calculations for systems where the interactions may be complicated and difficult for the chosen computational method to handle. Here we address the problem by introducing an approach called wavefunction matching. Wavefunction matching transforms the interaction between particles so that the wavefunctions up to some finite range match that of an easily computable interaction. This allows for calculations of systems that would otherwise be impossible owing to problems such as Monte Carlo sign cancellations. We apply the method to lattice Monte Carlo simulations(15,16)of light nuclei, medium-mass nuclei, neutron matter and nuclear matter. We use high-fidelity chiral effective field theory interactions(17,18) and find good agreement with empirical data. These results are accompanied by insights on the nuclear interactions that may help to resolve long-standing challenges in accurately reproducing nuclear binding energies, charge radii and nuclear-matter saturation in ab initio calculations(19,20).