This title appears in the Scientific Report : 2013 

Quantum Monte Carlo Calculations with Chiral Effective Field Theory Interactions
Gezerlis, A. (Corresponding author)
Tews, I. / Epelbaum, E. / Gandolfi, S. / Hebeler, K. / Nogga, A. / Schwenk, A.
Theorie der Starken Wechselwirkung; IAS-4
Theorie der starken Wechselwirkung; IKP-3
Physical review letters, 111 (2013) 3, S. 032501
College Park, Md. APS 2013
Journal Article
Hadron Structure and Dynamics (HSD)
Please use the identifier: in citations.
Please use the identifier: in citations.
We present the first quantum Monte Carlo (QMC) calculations with chiral effective field theory (EFT) interactions. To achieve this, we remove all sources of nonlocality, which hamper the inclusion in QMC calculations, in nuclear forces to next-to-next-to-leading order. We perform auxiliary-field diffusion Monte Carlo (AFDMC) calculations for the neutron matter energy up to saturation density based on local leading-order, next-to-leading order, and next-to-next-to-leading order nucleon-nucleon interactions. Our results exhibit a systematic order-by-order convergence in chiral EFT and provide nonperturbative benchmarks with theoretical uncertainties. For the softer interactions, perturbative calculations are in excellent agreement with the AFDMC results. This work paves the way for QMC calculations with systematic chiral EFT interactions for nuclei and nuclear matter, for testing the perturbativeness of different orders, and allows for matching to lattice QCD results by varying the pion mass.