Ab initio and phenomenological studies of the static response of neutron matter

Buraczynski, Mateusz; Gezerlis, Alexandros

doi:10.1103/PhysRevC.95.044309

Title: Ab initio and phenomenological studies of the static response of neutron matter

Journal Article · Sat Apr 01 00:00:00 EDT 2017 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.95.044309· OSTI ID:1523845

Buraczynski, Mateusz ^[1]; Gezerlis, Alexandros ^[1]

Univ. of Guelph, ON (Canada). Dept. of Physics

We investigate the problem of periodically modulated strongly interacting neutron matter. We carry out ab initio nonperturbative 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.

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Research Organization:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)

Sponsoring Organization:: USDOE

OSTI ID:: 1523845

Journal Information:: Physical Review C, Vol. 95, Issue 4; ISSN 2469-9985

Country of Publication:: United States

Language:: English

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