Comment on "Absence of Off-Diagonal Long- Range Order in hcp ${}^4$He Dislocation Cores"

Abstract

We contend that the arguments provided in Phys. Rev. Lett. 130, 016001 (2023), purporting to show the absence of off-diagonal long-range order in hcp ${}^4$He dislocation cores are misleading and incorrect. In particular, the one-body density matrix averaged over the whole crystalline sample provides no useful information on the possible superfluid behavior inside the quasi-one-dimensional core of a dislocation in the crystal.

References in corpus (5)

• Luttinger Liquid in the Core of Screw Dislocation in Helium-4
• Observation of Unusual Mass Transport in Solid hcp 4He
• Local stress and superfluid properties of solid Helium-4
• Supertransport by Superclimbing Dislocations in ${}^4$He: When All Dimensions Matter
• Absence of off-diagonal long-range order in hcp ${}^4$He dislocation cores