Ab initio and phenomenological studies of the static response of neutron matter
Abstract
We investigate the problem of periodically modulated strongly interacting neutron matter. We carry out ab initio non-perturbative auxiliary-field diffusion Monte Carlo calculations using an external sinusoidal potential in addition to phenomenological two- and three-nucleon interactions. Several choices for the wave function ansatz are explored and special care is taken to extrapolate finite-sized results to the thermodynamic limit. We perform calculations at various densities as well as at different strengths and periodicities of the one-body potential. Our microscopic results are then used to constrain the isovector term from energy-density functional theories of nuclei at many different densities, while making sure to separate isovector contributions from bulk properties. Lastly, we use our results to extract the static density-density linear response function of neutron matter at different densities. Our findings provide insights into inhomogeneous neutron matter and are related to the physics of neutron star crusts and neutron-rich nuclei.
Keywords
Cite
@article{arxiv.1608.03598,
title = {Ab initio and phenomenological studies of the static response of neutron matter},
author = {Mateusz Buraczynski and Alexandros Gezerlis},
journal= {arXiv preprint arXiv:1608.03598},
year = {2017}
}
Comments
11 pages, 15 figures; 1 figure added; v2 corresponds to published version