Spin-polarized low-density neutron matter

Abstract

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.

8 pages, 3 figures, 1 table; v2 corresponds to the published version

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• An accurate nucleon-nucleon potential with charge-independence breaking
• The equation of state for nucleon matter and neutron star structure
• Modern Theory of Nuclear Forces
• Superfluid Fermi Gases with Large Scattering Length
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• The Equation of State of a Low-Temperature Fermi Gas with Tunable Interactions
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• Asymmetric Two-component Fermion Systems in Strong Coupling
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• Low-density neutron matter
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• Resonant Fermi gases with a large effective range
• Thermodynamic Measurements in a Strongly Interacting Fermi Gas
• A Unitary Fermi Supersolid: The Larkin-Ovchinnikov Phase
• Spin susceptibility of neutron matter at zero temperature
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• Sensitivity of the Moment of Inertia of Neutron Stars to the Equation of State of Neutron-Rich Matter
• Ground state energy of dilute neutron matter at next-to-leading order in lattice chiral effective field theory
• Polarization Measurements and the Pairing Gap in the Universal Regime
• Spin polarized neutron matte and magnetic susceptibility within the Brueckner-Hartree-Fock approximation
• Superfluid Heat Conduction and the Cooling of Magnetized Neutron Stars
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• Lattice Calculation of Thermal Properties of Low-Density Neutron Matter with Pionless NN Effective Field Theory
• Total control over ultracold interactions via electric and magnetic fields
• Polarized Neutron Matter: A Lowest Order Constrained Variational Approach
• Spin polarized neutron matter within the Dirac-Brueckner-Hartree-Fock approach
• Low densities in asymmetric nuclear matter
• Neutron matter at low density and the unitary limit
• Neutron Fermi Liquids under the presence of a strong magnetic field with effective nuclear forces

Cited by in corpus (7)

• Quantum Monte Carlo Calculations with Chiral Effective Field Theory Interactions
• Resummation of in-medium ladder diagrams: s-wave effective range and p-wave interaction
• Path integral contour deformations for noisy observables
• The neutron polaron as a constraint on nuclear density functionals
• Phase separation in low-density neutron matter
• Fermi polaron in low-density spin-polarized neutron matter
• Ab initio study of the neutron and Fermi polarons on the lattice