Why not a superfluid solid?

TL;DR

This paper explores the theoretical possibility of a superfluid fraction in a Bose solid without defects, proposing a Hartree-Fock based scenario that challenges conventional beliefs.

Contribution

It introduces a novel Hartree-Fock theoretical framework suggesting a superfluid component in a defect-free Bose solid, which is a departure from traditional views.

Findings

Proposes a scenario for superfluidity in a perfect Bose solid

Uses Hartree-Fock treatment to support the hypothesis

Challenges the conventional understanding of Bose solids

Abstract

The question of whether a Bose solid can have a superfluid fraction in the absence of interstitials, holes or other defects is discussed. An unlikely scenario which may accommodate this possibility is proposed, based on a Hartree-Fock treatment of the quantum solid. It is now believed that this version is correct