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math-ph2026
Relative trace formulas for obstacle scattering with Neumann and transmission boundary conditions
Arne Hofmann, Alexander Strohmaier
We consider the case of scattering by several obstacles in for . We establish a relative trace formula for Neumann and transmission boundary conditions ana…
math-ph2026
An analytic approach to the stress energy tensor in quantum field theory
Alexander Strohmaier
We discuss a framework for quantum fields in curved spacetimes that possess a stress energy tensor as a connection one form on a suitable moduli space of metrics. In generic spacet…
math-ph2026
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…