Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2010-12-20
Phys.Rev.C83:065801,2011
Physics
Nuclear Physics
Nuclear Theory
8 pages, 3 figures, 1 table; v2 corresponds to the published version
Scientific paper
10.1103/PhysRevC.83.065801
Low-density neutron matter is relevant to the study of neutron-rich nuclei and neutron star crusts. Unpolarized neutron matter has been studied extensively over a number of decades, while experimental guidance has recently started to emerge from the field of ultracold atomic gases. In this work, we study population-imbalanced neutron matter (possibly relevant to magnetars and to density functionals of nuclei) applying a Quantum Monte Carlo method that has proven successful in the field of cold atoms. We report on the first ab initio simulations of superfluid low-density polarized neutron matter. For systems with small imbalances, we find a linear dependence of the energy on the polarization, the proportionality coefficient being dependent on the density. We also present results for the momentum and pair distributions of the two fermionic components.
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