98 citations · 262 across the 4 of their papers we have counts for
4 papers
The Refractive Index of Curved Spacetime: the Fate of Causality in QED
Timothy J. Hollowood, Graham M. Shore
It has been known for a long time that vacuum polarization in QED leads to a superluminal low-frequency phase velocity for light propagating in curved spacetime. Assuming the valid…
Causality and Micro-Causality in Curved Spacetime
Timothy J. Hollowood, Graham M. Shore
We consider how causality and micro-causality are realised in QED in curved spacetime. The photon propagator is found to exhibit novel non-analytic behaviour due to vacuum polariza…
The U(1)_A Anomaly and QCD Phenomenology
G. M. Shore
The role of the anomaly in QCD phenomenology is reviewed, focusing on the relation between quark dynamics and gluon topology. Topics covered include a generalisation of th…
Superluminality and UV Completion
G. M. Shore
The idea that the existence of a consistent UV completion satisfying the fundamental axioms of local quantum field theory or string theory may impose positivity constraints on the…