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Quantum Monte Carlo calculations of neutron matter with chiral three-body forces

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arxiv 1507.05561 v2 pith:7T7Z6STQ submitted 2015-07-20 nucl-th

I. Tews , S. Gandolfi , A. Gezerlis , A. Schwenk This is my paper · ORCID
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keywords chirallocalcarloforcesinteractionsmonteneutronafdmc
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abstract

Chiral effective field theory (EFT) enables a systematic description of low-energy hadronic interactions with controlled theoretical uncertainties. For strongly interacting systems, quantum Monte Carlo (QMC) methods provide some of the most accurate solutions, but they require as input local potentials. We have recently constructed local chiral nucleon-nucleon (NN) interactions up to next-to-next-to-leading order (N$^2$LO). Chiral EFT naturally predicts consistent many-body forces. In this paper, we consider the leading chiral three-nucleon (3N) interactions in local form. These are included in auxiliary field diffusion Monte Carlo (AFDMC) simulations. We present results for the equation of state of neutron matter and for the energies and radii of neutron drops. In particular, we study the regulator dependence at the Hartree-Fock level and in AFDMC and find that present local regulators lead to less repulsion from 3N forces compared to the usual nonlocal regulators.

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Cited by 2 Pith papers

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  2. Benchmark calculations of pure neutron matter with realistic nucleon-nucleon interactions

    nucl-th 2019-08 conditional novelty 6.0 of 10

    Benchmark neutron-matter calculations find that unconstrained auxiliary-field diffusion Monte Carlo agrees with Brueckner-Bethe-Goldstone theory, while constrained AFDMC overestimates the energy when spin-orbit forces...

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