# Interface effects of strange quark matter

## TL;DR

This paper investigates the interface effects in strange quark matter using an equivparticle model, highlighting how surface tension and curvature depend on density and impact the properties of stable and unstable SQM.

## Contribution

It provides a detailed calculation of surface tension and curvature terms of SQM within an equivparticle model under mean-field approximation, with implications for strange star properties.

## Key findings

- Surface tension increases monotonically with density at zero external pressure.
- Estimated surface tension is approximately 2.4 MeV/fm² for a 2 solar mass strange star.
- Surface tension values vary depending on model parameters.

## Abstract

The interface effects play important roles for the properties of strange quark matter (SQM) and the related physical processes. We show several examples on the implications of interface effects for both stable and unstable SQM. Based on an equivparticle model and adopting mean-field approximation (MFA), the surface tension and curvature term of SQM can be obtained, which are increasing monotonically with the density of SQM at zero external pressure. For a parameter set constrained according to the 2$M_\odot$ strange star, we find the surface tension is $\sim$2.4 MeV/fm${}^2$, while it is larger for other cases.