Many-Body Perturbation Theories for Finite Nuclei

• Main Authors: Alexander Tichai, Robert Roth, Thomas Duguet
• Format: Article
• Language: English
• Published: Frontiers Media S.A. 2020-06-01
• Series: Frontiers in Physics
• Subjects: many-body theory; ab initio; perturbation theory; correlation expansion; open-shell nuclei
• Online Access: https://www.frontiersin.org/article/10.3389/fphy.2020.00164/full

In recent years many-body perturbation theory encountered a renaissance in the field of ab initio nuclear structure theory. In various applications it was shown that perturbation theory, including novel flavors of it, constitutes a useful tool to describe atomic nuclei, either as a full-fledged many-body approach or as an auxiliary method to support more sophisticated non-perturbative many-body schemes. In this work the current status of many-body perturbation theory in the field of nuclear structure is discussed and novel results are provided that highlight its power as a efficient and yet accurate (pre-processing) approach to systematically investigate medium-mass nuclei. Eventually a new generation of chiral nuclear Hamiltonians is benchmarked using several state-of-the-art flavors of many-body perturbation theory.