Hadamard states for quantized Dirac fields on Lorentzian manifolds of bounded geometry

C Gérard, T Stoskopf - Reviews in Mathematical Physics, 2022 - World Scientific
We consider Dirac equations on even-dimensional Lorentzian manifolds of bounded
geometry with a spin structure. For the associated free quantum field theory, we construct …

Pseudodifferential operators on manifolds with a Lie structure at infinity

B Ammann, R Lauter, V Nistor - Annals of Mathematics, 2007 - JSTOR
We define and study an algebra Ψ_1,0,\calV^∞(M_0) of pseudodifferential operators
canonically associated to a noncompact, Riemannian manifold M_0 whose geometry at …

On the geometry of Riemannian manifolds with a Lie structure at infinity

B Ammann, R Lauter, V Nistor - International Journal of …, 2004 - Wiley Online Library
We study a generalization of the geodesic spray and give conditions for noncomapct
manifolds with a Lie structure at infinity to have positive injectivity radius. We also prove that …

Microlocal analysis of quantum fields on curved spacetimes

C Gérard - arXiv preprint arXiv:1901.10175, 2019 - arxiv.org
These lecture notes give an exposition of microlocal analysis methods in the study of
Quantum Field Theory on curved spacetimes. We concentrate on free fields and the …

Hadamard states for the Klein–Gordon equation on Lorentzian manifolds of bounded geometry

C Gérard, O Oulghazi, M Wrochna - Communications in Mathematical …, 2017 - Springer
Abstract We consider the Klein–Gordon equation on a class of Lorentzian manifolds with
Cauchy surface of bounded geometry, which is shown to include examples such as exterior …

Fredholm conditions on non-compact manifolds: theory and examples

C Carvalho, V Nistor, Y Qiao - … theory, operator algebras, and matrix theory, 2018 - Springer
We give explicit Fredholm conditions for classes of pseudodifferential operators on suitable
singular and non-compact spaces. In particular, we include a “user's guide” to Fredholm …

Unbounded pseudodifferential calculus on Lie groupoids

S Vassout - Journal of Functional analysis, 2006 - Elsevier
We develop an abstract theory of unbounded longitudinal pseudodifferential calculus on
smooth groupoids (also called Lie groupoids) with compact basis. We analyze these …

The massive Feynman propagator on asymptotically Minkowski spacetimes

C Gérard, M Wrochna - American Journal of Mathematics, 2019 - muse.jhu.edu
We consider the massive Klein-Gordon equation on asymptotically Minkowski spacetimes,
in the sense that the manifold is $\Bbb {R}^{1+ d} $ and the metric approaches that of …

Complex powers of the wave operator and the spectral action on Lorentzian scattering spaces

NV Dang, M Wrochna - Journal of the European Mathematical Society, 2023 - ems.press
Complex powers of the wave operator and the spectral action on Lorentzian scattering spaces
Page 1 © 2023 European Mathematical Society Published by EMS Press J. Eur. Math. Soc …

Hadamard Property of the in and out States for Klein–Gordon Fields on Asymptotically Static Spacetimes

C Gérard, M Wrochna - Annales Henri Poincaré, 2017 - Springer
We consider the massive Klein–Gordon equation on a class of asymptotically static
spacetimes (in the long-range sense) with Cauchy surface of bounded geometry. We prove …