Gauge invariant fermion propagator in QED3

TL;DR

This paper defends the authors' previous calculation of the gauge invariant fermion propagator in QED3, clarifying their methodology and addressing criticisms to reaffirm the validity of their approach in the context of high-T_c cuprate superconductors.

Contribution

The paper provides a detailed clarification of the computation method for the gauge invariant fermion propagator in QED3 and counters recent criticisms questioning its validity.

Findings

The authors' original computation is valid and robust.

The criticism in the preprint is unwarranted.

The methodology supports the effective theory of high-T_c cuprate superconductors.

Abstract

In a recent preprint [cond-mat/0204040] Khveshchenko questioned the validity of our computation of the gauge invariant fermion propagator in QED3, which we employed as an effective theory of high-T_c cuprate superconductors [cond-mat/0203333]. We take this opportunity to further clarify our procedure and to show that criticism voiced in the above preprint is unwarranted.