152 citations · 2.3k across the 94 of their papers we have counts for
99 papers
When one sign is not enough: 2+1 circular motion Unruh effect at low energies
Leo J. A. Parry, Christopher J. Fewster, Jorma Louko
We address the circular motion Unruh effect in 2+1 spacetime dimensions, as probed by a pointlike Unruh-DeWitt detector coupled to a massless scalar field. The effective temperatur…
Coupled Proca theories: Green-hyperbolicity, quantization and applications to polarization measurement
Christopher J. Fewster, Christiane K. M. Klein
The Proca field describes a massive relativistic spin- particle and was originally formulated in Minkowski spacetime. Here we consider a variety of generalizations in globally h…
On the construction of Hadamard states from Feynman propagators
Christopher J. Fewster, Alexander Strohmaier
The Wightman two-point function of any Hadamard state of a linear quantum field theory determines a corresponding Feynman propagator. Conversely, however, a Feynman propagator dete…
Measurement and preparation protocols for quantum field theory on curved spacetimes
Christopher J. Fewster
In this conference proceedings contribution, I describe work in progress concerning two problems in the measurement theory of quantum fields. First, it is proved that all local obs…
Semi-local observables, edge modes and quantum reference frames in quantum electromagnetism: an algebraic approach
Christopher J. Fewster, Daan W. Janssen, Kasia Rejzner
Boundaries and corners of spacetime play a vital role in understanding physical concepts including entanglement entropy, the infrared problem in QFT and quantum gravity. Standard l…
Waiting around for Unruh
Leo J. A. Parry, Diego Vidal-Cruzprieto, Christopher J. Fewster +1
How long does a uniformly rotating observer need to interact with a quantum field in order to register an approximately thermal response due to the circular motion Unruh effect? We…