Dr. Stephan Stieberger
Permanent
Staff Member & Research Group Leader
copyright: A. Griesch/MPP
Research interests
- Celestial and Carrollian conformal field theories, flat-space holography and asymptotic symmetries
- New formulations, structures and amplitude techniques in gauge and gravity theories: soft-theorems, spinors and twistors
- Relations between gravitational and gauge amplitudes
- Perturbative string theory: string amplitudes and implications for field theory
- Non-perturbative effects in superstring theory: instanton corrections and string dualities
- String phenomenology: effective actions, low mass strings and implications for LHC
- Number theory and arithmetic algebraic geometry: periods, modular forms, multiple Gaussian hypergeometric functions, multiple Euler-Zagier sums, and motivic aspects
Search for publications via inSPIRE
Recent (selected) talks
- One-loop Double Copy Relation in String Theory and Twisted (Co)homology: Mathematical Aspects of Scattering Amplitudes Program, Center of Mathematical Sciences and Applications, Harvard University, Cambridge, USA; May 2024
- Celestial and Carrollian Amplitudes and Celestial Liouville Theory: Carrollian Physics and Holography, Erwin Schrödinger International Institute for Mathematics and Physics (ESI), Wien, Austria; April 2024
- Scattering Amplitudes
on Riemann Surfaces: Elliptics & Beyond '23, ETH Zürich, Zürich, Switzerland; September 2023
- Celestial Amplitudes: QCD Meets Gravity 2022, Universität Zürich, Zürich, Switzerland; December 2022
- Celestial Amplitudes and Asymptotic Symmetries: Celestial Holography, Princeton University, Princeton, USA; February 2021
- Symmetries of Celestial Amplitudes: Amplitudes 2020, University of Michigan, Ann Arbor, Michigan, USA; May 2020
- Strings on Celestial Sphere: Spacetime and Quantum Mechanics, Total Positivity and Motives, Center of Mathematical Sciences and Applications, Harvard University, Cambridge, USA; December 2019
- Strings on Celestial Sphere: String Phenomenology 2018, Faculty of Physics, University of Warsaw, Poland; July 2018
- Single-Valued Multiple Zeta Values and String Amplitudes: Periods in Number Theory, Algebraic Geometry and Physics, Hausdorff Research Institute for Mathematics, Bonn, Germany; February 2018
- Monodromy Relations in Higher-Loop String Amplitudes: Scattering Amplitudes: from Gauge Theory to Gravity, KITP, University of California, Santa Barbara, USA; April 2017
- New Relations Between Gauge and Gravity Amplitudes in Field and String Theory: HKUST Jockey Club Institute for Advanced Study, Hongkong, China; January 2017
- New Relations for Einstein-Yang-Mills Amplitudes: Amplitudes 2016, Nordita, Stockholm, Sweden; July 2016
- Superstring Amplitudes: MHV and Beyond: MHV @ 30: Amplitudes and Modern Applications, Fermilab, Batavia, Illinois, USA; March 2016
- Unity of tree-level superstring amplitudes: Strings 2014, Princeton, USA; June 2014
- On Superstring/Supergravity Mellin Correspondence in Grassmannian Formulation: The Geometry and Physics of Scattering Amplitudes, SCGP, Stony Brook, USA; December 2013
- Motivic Superstring Amplitudes: Department of Mathematics, Yale University, New Haven, USA; November 2012
- Structure of Open and Closed Superstring Amplitudes: Amplitudes 2012, DESY Hamburg, Germany; March 2012
Lecture Summer Term 2019
- New Methods and Structures of Scattering Amplitudes, for more details click here,
Ludwig-Maximilians Universität, Arnold Sommerfeld Center for Theoretical Physics,
Lecture: Monday 16:00-18:00 at B139 and Friday 12:00-14:00 at B046, Theresienstr. 39;
Exercises: Wednesday 14:00-16:00 at H030, Schellingstr. 4
Past (selected) international lectures
- Scattering Amplitudes in String Theory, Spring School on Superstring Theory and Related Topics; ICTP Trieste; April 2014
- Superstring Amplitudes, LACES 2014; Galileo Galilei Institute for Theoretical Physics (GGI) Firenze; December 2014
- Superstring Amplitudes, The 11th Asian Winter School on Strings, Particles, and Cosmology; Sun Yat-sen University, Zhuhai, Guangdong, China; January 2017
- Celestial Amplitudes and Asymptotic Symmetries, School on Recent Developments in S-matrix theory;
ICTS, Tata Institute of Fundamental Research, Bangalore, India; July 2020
(Recent) Workshops
Activities
Past Activities
CV
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