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

Mateusz Buraczynski and Alexandros Gezerlis
Phys. Rev. C 95, 044309 – Published 7 April 2017

Abstract

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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  • Received 16 August 2016
  • Revised 31 January 2017

DOI:https://doi.org/10.1103/PhysRevC.95.044309

©2017 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

Mateusz Buraczynski and Alexandros Gezerlis

  • Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada

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Issue

Vol. 95, Iss. 4 — April 2017

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