We point out a critical defect in the calculation of the functional determinant of the gluon loop in the Savvidy-Nielsen-Olesen (SNO) effective action. We prove that the gauge invariance naturally exclude the unstable tachyonic modes from the gluon loop integral. This guarantees the stability of the magnetic condensation in QCD.
A Fast Way to Compute Functional Determinants of Radially Symmetric Partial Differential Operators in General Dimensions
Neutrino Polarization as a Consequence of Gauge Invariance
Seiberg--Witten maps for $\boldsymbol{SO(1,3)}$ gauge invariance and deformations of gravity
