Low-density neutron matter

Abstract

The properties of low-density neutron matter are important for the understanding of neutron star crusts and the exterior of large neutron-rich nuclei. We examine various properties of dilute neutron matter using quantum Monte Carlo methods, with s- and p-wave terms in the interaction. Our results provide a smooth evolution of the equation of state and pairing gap from extremely small densities, where analytic expressions are available, up to the strongly interacting regime probed experimentally and described theoretically in cold atomic systems, where the Fermi momentum is approximately half an inverse fermi and the pairing gap becomes of the order of magnitude of the Fermi energy. We also present results for the momentum distribution and pair distributions, displaying the same evolution from weak to strong coupling. Combined with previous quantum Monte Carlo and other calculations at moderate densities, these results provide strong constraints on the neutron matter equation of state up to saturation densities.

10 pages, 9 figures; 2 references added; v2 corresponds to the published version

References in corpus (18)

• Phase diagram of a two-component Fermi gas with resonant interactions
• Strongly paired fermions: Cold atoms and neutron matter
• Neutrino Emission from Cooper Pairs and Minimal Cooling of Neutron Stars
• Determination of the Superfluid Gap in Atomic Fermi Gases by Quasiparticle Spectroscopy
• Further explorations of Skyrme-Hartree-Fock-Bogoliubov mass formulas. IX: Constraint of pairing force to ${}^1{S}_0$ neutron-matter gap
• Screening Effects in Superfluid Nuclear and Neutron Matter within Brueckner Theory
• A Unitary Fermi Supersolid: The Larkin-Ovchinnikov Phase
• Equation of state of superfluid neutron matter and the calculation of ${}^1{S}_0$ pairing gap
• Effective pairing interactions with isospin density dependence
• Polarization Measurements and the Pairing Gap in the Universal Regime
• Superfluid Heat Conduction and the Cooling of Magnetized Neutron Stars
• Hot neutron matter from a Self-Consistent Green's Functions approach
• Equation of state of low--density neutron matter and the ${}^1{S}_0$ pairing gap
• ${}^1{S}_0$ superfluid phase--transition in neutron matter with realistic nuclear potentials and modern many--body theories
• Superfluid Response and the Neutrino Emissivity of Neutron Matter
• Total control over ultracold interactions via electric and magnetic fields
• Low densities in asymmetric nuclear matter
• Neutron matter at low density and the unitary limit

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