Path-integral quantum Monte Carlo calculations of light nuclei

Rong Chen, Kevin E. Schmidt

Research output: Contribution to journalArticlepeer-review

Abstract

We describe a path-integral ground-state quantum Monte Carlo method for light nuclei in continuous space. We show how to efficiently update and sample the paths with spin-isospin dependent and spin-orbit interactions. We apply the method to the triton and α particle using both local chiral interactions with next-to-next-to-leading-order and the Argonne interactions. For operators, like the total energy, that commute with the Hamiltonian, our results agree with Green's function Monte Carlo and auxiliary field diffusion Monte Carlo calculations. For operators that do not commute with the Hamiltonian and for Euclidean response functions, the path-integral formulation allows straightforward calculation without forward walking or the increased variance typical of diffusion methods. We demonstrate this by calculating density distributions, root-mean-square radii, and Euclidean response functions for single-nucleon couplings.

Original languageEnglish (US)
Article number044327
JournalPhysical Review C
Volume106
Issue number4
DOIs
StatePublished - Oct 2022
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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