Services en ligne
Annuaire IPN
IPN Mails
Rechercher
Accueil du site > Publications récentes > Lee-Yang–inspired functional with a density-dependent neutron-neutron scattering length
Lee-Yang–inspired functional with a density-dependent neutron-neutron scattering length
M. Grasso, D. Lacroix, and C. J. Yang
Inspired by the low-density Lee-Yang expansion for the energy of
a dilute Fermi gas of density ρ
and momentum kF,
we introduce here a Skyrme-type functional that contains only s-wave
terms and provides, at the mean-field level, (i) a satisfactory
equation of state for neutron matter from extremely low densities
up to densities close to the equilibrium point, and (ii) a
good-quality equation of state for symmetric matter at density
scales around the saturation point. This is achieved by using a
density-dependent neutron-neutron scattering length a(ρ)
which satisfies the low-density limit (for Fermi momenta going to
zero) and has a density dependence tuned in such a way that the
low-density constraint |a(ρ)kF|≤1
is satisfied at all density scales.
Voir en ligne : Phys. Rev. C 95, 054327 (2017)
Fil RSS du site