Work

In-medium similarity renormalization group with flowing 3-body operators, and approximations thereof

Year: 2024

Type: article

Abstract: We explore the impact of retaining three-body operators within the in-medium similarity renormalization group (IMSRG), as well as various approximations schemes. After studying two toy problems, identical fermions with a contact interaction and the Lipkin-Meshkov-Glick model, we employ the valence-space formulation of the IMSRG to investigate the even-$A$ carbon isotopes with a chiral two-body potential. We find that retaining only those commutators expressions that scale as ${N}^{7}$ provides an excellent approximation of the full three-body treatment.

Source: Physical Review C

DOI: 10.1103/physrevc.110.044316

Authors: S. R. Stroberg, T. D. Morris, B. C. He

Institutions: University of Notre Dame, Argonne National Laboratory, University of Washington, Oak Ridge National Laboratory

Language: English

Topic: Nuclear physics research studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: U.S. Department of Energy, Battelle, UT-Battelle, Office of Science