Spectral Geometry and the One-Loop QED ${\hat{I}}^2$-Function on $S^3\times S^1$

Lyudmil Antonov

We compute the one-loop QED ${\hat{I}}^2$-function coefficient directly from heat kernel data of the twisted Spin${}^c$ Dirac operator on $S^3\times S^1$. Using $\hat{I}\P$-function regularization,…