On the positivity of propagator differences
Analysis of PDEs
2014-11-27 v1 Differential Geometry
Spectral Theory
Abstract
We discuss positivity properties of `distinguished propagators', i.e. distinguished inverses of operators that frequently occur in scattering theory and wave propagation. We relate this to the work of Duistermaat and H\"ormander on distinguished parametrices (approximate inverses), which has played a major role in quantum field theory on curved spacetimes recently.
Cite
@article{arxiv.1411.7242,
title = {On the positivity of propagator differences},
author = {András Vasy},
journal= {arXiv preprint arXiv:1411.7242},
year = {2014}
}
Comments
19 pages, 1 figure