Kort om
- Academic interests: mathematical quantum chemistry
- Research: Andre’s research interest is mathematical quantum chemistry. During his PhD he worked on the mathematical formulation of density-functional theory for systems included magnetic fields. After that Andre focused for many years on coupled-cluster theory and its many variants and with a special interest to be able to describe also excited states and not just the ground state. Most central to Andre´s research at the moment is the Moreau-Yosida regularization and its application in density-functional theory.
- Current projects: PI of two projects REGAL (ERC funded) and CCerror (RCN funded). The ERC funded project REGAL (https://uni.oslomet.no/regal/) started Sept. 2022. The aim of this project is to investigate density-functional theory in a lossless (Moreau-Yosida) regularized setting.
- Academic Degrees (from Royal Institute of Technology, Stockholm, Sweden):
- Master of Science in Biotechnology (September 2008, final grade: 5.0/5.0, Thesis 5.0/5.0)
- Ph.D in applied mathematics (June 2014, supervisor: M. Benedicks, co-supervisors: A. Szepessy and O. Vahtras)
- Teachings:
- Spring 2023: MEK2200 Statistics and Risk Management
- Autumn 2023: ACIT4310 Applied and Computational Mathematics
Fagfelt
Forskningsgrupper
Publikasjoner og forskningsresultater
Vitenskapelige publikasjoner
Penz, Markus ; Laestadius, Andre (2025). Adaptation of Moreau-Yosida regularization to the modulus of convexity. arXiv.
Herbst, Michael F.;
Bakkestuen, Vebjørn Hallberg
;
Laestadius, Andre
(2025).
Kohn-Sham inversion with mathematical guarantees.
Physical review B (PRB).
Vol. 111.
https://doi.org/10.1103/PhysRevB.111.205143
Bakkestuen, Vebjørn Hallberg
;
Falmår, Vegard
;
Lotfigolian, Maryam
;
Penz, Markus
; Ruggenthaler, Michael;
Laestadius, Andre
(2025).
Quantum-Electrodynamical Density-Functional Theory Exemplified by the Quantum Rabi Model.
Journal of Physical Chemistry A.
Vol. 129.
https://doi.org/10.1021/acs.jpca.4c07690
Csirik, Mihaly Andras
;
Laestadius, Andre
; Tellgren, Erik
(2024).
Thermodynamic limit for the magnetic uniform electron gas and representability of density-current pairs.
Journal of Mathematical Physics.
Vol. 65.
https://doi.org/10.1063/5.0198786
Laestadius, Andre
;
Csirik, Mihaly Andras
;
Penz, Markus
; Tancogne-Dejean, Nicolas; Ruggenthaler, Michael; Rubio, Angel; Helgaker, Trygve
(2024).
Exchange-only virial relation from the adiabatic connection.
Journal of Chemical Physics.
Vol. 160.
https://doi.org/10.1063/5.0184934
Tancogne-Dejean, Nicolas; Penz, Markus;
Laestadius, Andre
;
Csirik, Mihaly Andras
; Ruggenthaler, Michael; Rubio, Angel
(2024).
Exchange energies with forces in density-functional theory.
Journal of Chemical Physics.
Vol. 160.
https://doi.org/10.1063/5.0177346
Csirik, Mihaly Andras
;
Laestadius, Andre
(2023).
Coupled-Cluster theory revisited: Part II: Analysis of the single-reference Coupled-Cluster equations.
ESAIM: Mathematical Modelling and Numerical Analysis (ESAIM: M2AN).
Vol. 57.
https://doi.org/10.1051/m2an/2022099
Faulstich, Fabian M.;
Laestadius, Andre
(2023).
Homotopy continuation methods for coupled-cluster theory in quantum chemistry.
Molecular Physics.
https://doi.org/10.1080/00268976.2023.2258599
Faulstich, Fabian M.; Kristiansen, Håkon Emil;
Csirik, Mihaly Andras
; Kvaal, Simen; Pedersen, Thomas Bondo;
Laestadius, Andre
(2023).
The S-diagnostic - an a posteriori error assessment for single-reference coupled-cluster methods.
Journal of Physical Chemistry A.
Vol. 127.
https://doi.org/10.1021/acs.jpca.3c01575
Csirik, Mihaly Andras
;
Laestadius, Andre
(2023).
Coupled-Cluster theory revisited: Part I: Discretization.
ESAIM: Mathematical Modelling and Numerical Analysis (ESAIM: M2AN).
Vol. 57.
https://doi.org/10.1051/m2an/2022094
