Comment on "Berry phase correction to electron density in solids" by Xiao et al

TL;DR

This paper clarifies that the main result of Xiao et al. regarding Berry phase correction to electron density in solids can be derived directly from Hamiltonian mechanics, providing a theoretical validation.

Contribution

It demonstrates that Xiao et al.'s result follows from fundamental Hamiltonian mechanics, offering a theoretical perspective on their findings.

Findings

Main result derived from Hamiltonian mechanics

Provides theoretical validation of previous work

Clarifies the foundational basis of Berry phase correction

Abstract

The main result of Xiao et al. [ Phys. Rev. Lett. 95, 137204 (2005)] is shown to follow from Hamiltonian mechanics.