Dynamical scheme for computing the mass parameter of a system in a medium

TL;DR

This paper introduces a novel time-dependent density functional theory method to compute mass parameters of systems in a medium, specifically applied to impurities in neutron star crusts, enabling more accurate microscopic modeling.

Contribution

The paper presents a new approach for extracting mass parameters in media using time-dependent density functional theory, applicable to nuclear systems in neutron star crusts.

Findings

Mass parameters of impurities in neutron star crusts were successfully extracted.

The method's results are consistent with existing hydrodynamic approaches.

This approach facilitates microscopic modeling of neutron star crusts.

Abstract

We present a new method for extracting a mass parameter using time-dependent density functional theory for an arbitrary physical system, provided the adiabatic limit is achievable. This approach works for collective variables also in the presence of a medium, in particular for the nuclei interacting with a neutron background. We apply the method to extract mass parameters of impurities in the neutron star crust, like their inertial masses and quadrupole mass parameters. The extracted mass parameters at various depths of the inner crust are compared with other methods, including the hydrodynamic approach. The presented method opens avenues for the construction of an effective model of neutron star crust grounded in microscopic calculations.