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mathematical, conceptual, and constructive problems in
local relativistic quantum physics (LQP).

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Daniel Siemssen's picture

Daniel Siemssen

University of York
http://www.dr-siemssen.de

Papers

Special cosmological models derived from the semiclassical Einstein equation on flat FLRW space-times

Hanno Gottschalk, Nicolai Rothe, Daniel Siemssen
December 30, 2021
semiclassical Einstein equation, vaccum like states, numerical solutions, big bang, late time de Sitter behavior
open access link Classical and Quantum Gravity, Volume 39, Issue 12, Page 125004, Year 2022

The Cosmological Semiclassical Einstein Equation as an Infinite-Dimensional Dynamical System

Hanno Gottschalk, Daniel Siemssen
September 11, 2018
open access link Ann. Henri Poincar\'e 22, 3915-3964 (2021)

Geometric Pseudodifferential Calculus on (Pseudo-)Riemannian Manifolds

Jan Dereziński, Adam Latosiński, Daniel Siemssen
June 05, 2018
open access link Annales Henri Poincar\'e 21, 1595-1635 (2020)

An Evolution Equation Approach to the Klein-Gordon Operator on Curved Spacetime

Jan Dereziński, Daniel Siemssen
September 12, 2017
Klein-Gordon, evolution operator
open access link Pure Appl. Analysis 1 (2019) 215-261

Quantum Energy Inequalities in Pre-Metric Electrodynamics

Christopher J. Fewster, Christian Pfeifer, Daniel Siemssen
September 06, 2017
open access link Phys. Rev. D 97, 025019 (2018)

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Slides

  • Title: Feynman propagators in a functional analytic setting
    Event: 41st LQP Workshop "Foundations and Constructive Aspects of QFT"
    Date: February 3, 2018
  • Title: Global Existence of Solutions of the Semiclassical Einstein Equation
    Event: Algebraic Quantum Field Theory - Its status and its future
    Date: May 19, 2014

Theses

The Semiclassical Einstein Equation on Cosmological Spacetimes

Daniel Siemssen
PhD Thesis, 2015, Università di Genova
Advisor: Nicola Pinamonti
QFT on curved spacetimes, semiclassical Einstein equation
open access link article file

Quantization of the Electromagnetic Potential in Asymptotically Flat Spacetimes

Daniel Siemssen
Diploma Thesis, 2011, Universität Hamburg
Advisors: Claudio Dappiaggi, Klaus Fredenhagen
QFT on curved spacetimes, Hadamard states, vector potential, asymptotically flat spacetimes
open access link

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