Invited

2021

Mini Course on Semiclassics
»Learning from Insulators: New Trends in the Study of Conduction Properties of Metals« held virtually
August 2021
Lorentz Center, The Netherlands

2020

On the Classification of Non-Hermitian Topological Insulators Modeled by Spectral Operators
»Theoretical studies of topological phases of matter«
virtual meeting
December 2020
Yukawa Institute, Kyoto University, Japan

On the Classification of Non-Hermitian Topological Insulators
»Joint Online Workshop between the Department of Materials Science and Metallurgy«
virtual meeting
August 2020
Cambridge University, UK & Tohoku University, Japan

2019

Linear Response Theory — An Analytic-Algebraic Approach
»Rigorous Statistical Mechanics and Related Topics«
November 2019
RIMS, Kyoto University, Japan

Deriving Bulk-Boundary Correspondences from Conserved Quantities — Topological Surface Modes at Metal-Dielectric Interfaces
»The 4th A3 Metamaterials Forum 2019«
August 2019
Hokkaido University, Sapporo, Japan

A Unified Framework for Many Non-Hermitian Topological Insulators — The Krein-Schrödinger Formalism and Applications to Conserved Quantities and Topological Classification
»Recent Advances in Topological Photonics«
June 2019
Institute for Basic Science, Center for Theoretical Physics of Complex Systems, Daejeon, Korea

2018

Deriving Bulk-Boundary Correspondences from Conserved Quantities — The Case of Homogeneous Electromagnetic Media
»BEC 2018 X — Variety and universality of bulk-edge correspondence in topological phases: From solid state physics to transdisciplinary concepts«
December 2018
Tsukuba University, Tokyo Campus, Tokyo, Japan

Towards a Rigorous Proof of Haldane’s Photonic Bulk-edge Correspondence
»Recent Progress in Mathematics of Topological Insulators«
September 2018
ETH Zürich, Switzerland

Topological Classification of Linear and Weakly Non-Linear Electromagnetic Media
»PIERS 2018«
August 2018
Toyama, Japan

2017

Topological Classification of Electromagnetic Media
»META 2017«
Incheon, South Korea, July 2017

New Phenomena in Classical Waves — Taking Inspiration from Quantum Mechanics
»Top Math-𝛷«
Pontificia Universidad de Chile, Santiago, Chile, May 2015

Rigorous Analogies Between Quantum Systems and Classical Waves — Using the Quantum Hall Effect for Light as a Lens
»Physical and Mathematical Approaches to Interacting Particles«
Tokyo Institute of Technology, Japan, January 2017

2016

Classification of Topological Insulators for Classical Light
»Topological States of Light and Beyond«
Center for Theoretical Physics of Complex Systems, Daejeon, South Korea, 20 June–19 July 2016

Rigorous Analogies Between Quantum Systems and Certain Wave Equations
»Spectral Theory of Novel Materials«
CIRM, Luminy, France, 18–22 April 2016

2015

Existence and Absence of Non-Linear Effects in Photonic Topological Insulators
»Mathematical Approach to Topological Phases in Spintronics«
Tohoku University, 6–9 October 2015

2014

Approximate Dynamics in Slowly Modulated Photonic Crystals for Physical States
»Warwick EPSRC Symposium on Statistical Mechanics: Many-Body Quantum Systems«
University of Warwick, 17-21 March 2014

2013

Approximate Dynamics in Slowly Modulated Photonic Crystals
University of Toronto, September 2013

2012

Approximate Dynamics in Slowly Modulated Photonic Crystals
»Recent Developments in the Mathematical Analysis of Large Systems«, organized by Christian Hainzl, Robert Seiringer & Stefan Teufel
Erwin–Schrödinger–Institut, Vienna, Austria, October 2012

Contributed

2020

Explaining The Presence of Surface States in Classical Waves via Novel, Non-Hermitian Bulk-Boundary Correspondences
»Topological phenomena in non-Hermitian and non-equilibrium systems«
February 2020
Tohoku University, Sendai, Japan

2017

Topological Classification of Electromagnetic Media
»Photonic Topological Insulators«
BIRS, Banff, Canada, September 2017

Magnetic Weyl Calculus — Quantizing Classical Systems with Magnetic Fields
»First San Pedro Meeting in Geometry and Physics«
San Pedro de Atacama, Chile, May 2017

2016

Classification of Topological Insulators for Classical Light
Mathematical Challenges in Quantum Mechanics
Bressanone, Italy, February 2016

2014

An Exhaustive Classification of Photonic Topological Insulators
»Topological Phases of Quantum Matter«, organized by Martin Zirnbauer
Erwin–Schrödinger–Institut, Vienna, Austria, August 2014

2012

The Long-Time Semiclassical Limit for Models of Cavity QED
»Spectral analysis of non-commutative harmonic oscillators and quantum devices«
Kyushu University, Fukuoka, Japan, November 2012

Seminar Talks

2022

On the Classification of Non-Selfadjoint Topological Insulators Modeled by Spectral Operators
»Probability Seminar«
May 2022
Tohoku University, Sendai, Japan

Having a Fresh Look at the Conductivity in Metals — A Semiclassical Definition of the Fermi Surface
April 2022
University of Cergy Paris, Cergy, France

Magnetic Pseudodifferential Super Operators — At the Intersection of Functional Analysis and Operator Algebras
»MPI Oberseminar«
April 2022
Max Planck Institute of Mathematics, Bonn, Germany

An Introduction to the Theory of Topological Insulators — At the Intersection of Analysis and Topology
»Topical Days on Topological Insulators«
April 2022
University of Groningen, Groningen, The Netherlands

2020

On the Classification of Non-Hermitian Topological Insulators and the Issue of Diagonalizability
»Mathematical Physics Seminar«
held virtually
November 2020
Shinshu University, Matsumoto, Japan

On the Classification of Non-Hermitian Topological Insulators and the Issue of Diagonalizability
»AIMR Tea Time Talk«
held virtually
October 2020
Tohoku University, Sendai, Japan

2019

A Pedagogical Guide to the Theory of Topological Insulators
October 2019
University of Tokyo, Japan

Towards a Rigorous Proof of Haldane’s Photonic Bulk-Edge Correspondence
July 2019
Hokkaido University, Department of Mathematics, Sapporo, Japan

Deriving Bulk-Boundary Correspondences from Conserved Quantities — Topological Surface Modes at Metal-Dielectric Interfaces
July 2019
Hokkaido University, Department of Mathematics, Sapporo, Japan

Linear Response Theory — An Analytic-Algebraic Approach
May 2019
Kyoto University, Japan

A Pedagogical Introduction to an Analytic-Algebraic Approach to Linear Response Theory
February 2019
Nagoya University, Japan

Towards a Rigorous Proof of Haldane’s Photonic Bulk-edge Correspondence
February 2019
University of Düsseldorf, Germany

A Guide to the Theory of Topological Insulators
February 2019
University of Düsseldorf, Germany

An Analytic-Algebraic Approach to Linear Response Theory
February 2019
University of Groningen, The Netherlands

2018

Maxwell-type Operators — A New Class of Operators Describing Classical Waves
September 2018
University of Groningen, The Netherlands

2017

Systematic Quantum-Wave Analogies and Applications to Topological Photonic Crystals — Using The Quantum Hall Effect for Light as a Lens
NIMS, Tsukuba, Japan, December 2017

Understanding Quantum-Wave Analogies with a Focus on Spin Waves
»Fusion Research Presentation«, Friday Tea Time
AIMR, Sendai, Japan, June 2017

2016

Unraveling the Relationship Between Topology and Physics
Physics Colloquium
Pontificia Universidad de Chile, Santiago, Chile, October 2016

“Semiclassical” Ray Optics in Photonic Crystals
Mathematics Colloquium
Pontificia Universidad de Chile, Santiago, Chile, October 2016

2015

The Schrödinger Formalism of Electromagnetism for Gyrotropic Materials and Its Topological Classification
Shinshu University, Matsumoto, Japan, Mathematics Department, December 2015

Combination of Algebraic and Pseudodifferential Techniques, and Applications to Topological Insulators
Tokyo University, Tokyo, Japan, Mathematics Department, November 2015

Photonic Topological Insulators and Their Effective Dynamics
RIKEN, Tokyo, Japan, November 2015

Classification of Photonic Topological Insulators and Their Effective Dynamics
Tohoku University, Sendai, Japan, Physics Department, September 2015

Ray Optics in Topologically Non-trivial Photonic Crystals
Newton Institute, Cambridge, UK, May 2015

Classification of Photonic Topological Insulators and Their Effective Dynamics
University of Ottawa, April 2015

2014

Analysis of ΨDOs by Combining Analytic and Algebraic Techniques
Operator Algebras Seminar
Fields Institute, January 2014

2013

Spectral Analysis of ΨDOs by Combining Analytic and Algebraic Techniques
RIMS Kyoto, January 2013

2012

Approximate Dynamics in Slowly Modulated Photonic Crystals
Universität Erlangen–Nürnberg, Erlangen, Germany, October 2012