3 papers
hep-th2025
Vortex Fractional Fermion Number through Heat Kernel methods and Edge States
Sylvain Fichet, Rodrigo Fresneda, Lucas de Souza +1
Computing the vacuum expectation of fermion number operator on a soliton background is often challenging. A recent proposal in arXiv:2305.13606 simplifies this task by considering…
hep-th2025
Carroll limit of one-loop effective action
Dmitri Vassilevich
In this paper, we consider a Carroll magnetic limit of a one-loop scalar effective action. We work on general static backgrounds and compute both divergent and finite parts of the…
hep-th2024
The chiral torsional anomaly and the Nieh-Yan invariant with and without boundaries
Johanna Erdmenger, Ioannis Matthaiakakis, René Meyer +1
There exists a long-standing debate regarding the torsion contribution to the 4d chiral anomaly of a Dirac fermion. Central to this debate is the Nieh-Yan anomaly, which has been c…