Group meetings

Group meetings

Group meetings take place on Wednesdays at 14:00 - 15:00 in the seminar room on the ground floor.

Research talks

Date	Speaker	Notes
Oct 01	Andrea	Impact of ground-state correlations on the nuclear response
Oct 16	Max	Exploring basis truncations and correlated mass models in ab initio calculations (Master Thesis presentation)
Oct 23	Luis	Crust equation of state and uncertainties from chiral effective field theory calculations (Master Proposal presentation)
Nov 05	Urban	Exploring new chiral interactions (.pptx, .pdf)
Nov 12	Yannick	Normal-ordered 3N forces in nuclear matter
Nov 26	Melissa	Updated constraints on the neutron star equation of state
Dec 03	Faruk	Describing finite temperature effects using FLT and investigating second-order correctios to the self-energy
Dec 10	Lotta	Imporved nuclear-theory predictions for neutrinoless double-beta decay
Dec 17
		Winter break
Jan 14	Mehdi	Nuclear corrections to muonic lithium atoms
Jan 21		Hirschegg Workshop
Jan 28	Hannah
Feb 04	Zhen	Truncations in many-body methods based on model space reduction (or wavefunction expansion)
Feb 11	Tom	New chiral interactions from correlated truncation uncertainties Gaussian process emulators for nuclear structure observables
Feb 18	Isak	Hierarchical Bayesian inference of the NN LECs at LO–N3LO
Feb 25		PAINT2026
Mar 04	Samet	Progress in including Hyperons in MBPT calculations of dense matter (.pptx, .pdf)
Mar 11	Alex
Mar 18		DPG Erlangen 2026
Mar 25	Kai

Journal Club

The primary goal is: to fill in gaps in knowledge of nuclear physics matters to develop group members into more well-rounded nuclear physicists.
The parallel goal is: to paint a picture regarding modern perspectives, outlooks, and approaches to answering fundamental questions in nuclear physics.
This means the fundamentals will still be covered but the club will approach topics in 2-3 meeting modules that will each build towards an interesting recent paper.

Past research talks

2025

Date	Speaker	Notes
July 09	Benjamin
Jun 25	Catharina	Collective EFT - neutrinoless ββ-decay from different correlations
Jun 18	Anna	Perturbative quantum chromodynamics constraints on the dense matter equation of state in a Bayesian inference framework
Jun 11	Isak	Uncertainty quantification for many-body perturbation theory
Jun 04	Samet	Towards including hyperons in Many-Body Perturbation Theory calculations of dense matter
May 28	Faruk	Properties of nuclear matter from Fermi Liquid Theory
Apr 30	Zhen	PART I: some updates on the 𝛽-decay half-lives of N=50 neutron-rich nuclei PART II: some developments on many-body perturbation theory and nuclear shell model
Apr 09	Alex	Ab initio description of Nuclear Deformation
Apr 02	Hannah	The nuclear equation of state in β-equilibrium with quantified uncertainties
Mar 26	Urban	Exploring new chiral interactions
Feb 12	Andrea	Exploring nuclear collectivity within the IMSRG
Jan 29	Margarida	Many-body emulators for nuclear structure
Jan 22	Catharina	Two-body currents at finite momentum transfer and applications to M1 transitions

2024

Date	Speaker	Notes
Dec 18	Isak	Inferring 3N LECs from multi-messenger neutron-star data
Dec 11		Diversity week reflection
Dec 04	Faruk	Neutron matter properties from Fermi liquid theory
Nov 27	Yannick	Nuclear Equation of State and FLT
Nov 20	Anna	Perturbative quantum chromodynamics constraints on the dense matter equation of state in a Bayesian inference framework (Master Proposal presentation)
Nov 15	Tom	Uncertainty quantification for similarity-renormalization-group-evolved interactions (Master presentation)
Nov 04	Samet	Impact of Hyperons on denese matter (Master Proposal presentation)
Oct 30	Zhen	Ab initio half-lives of r-process waiting point nuclei
Oct 23	Alex	Nuclear shapes from first principles
Oct 16	Nikolas	IMSRG calculations of charge radii for closed-shell mirror nuclei (Bachelor presentation)
Oct 09	Tom	Normal ordering of chiral two-body currents and magnetic moments (Bachelor presentation)
Oct 07	Andrea	Constraining the incompressibility from the monopole strength
Sep 25	Melissa	Constraining the dense matter EOS with new NICER mass-radius measurements and new(er) chiral EFT inputs
Sep 18	Urban	Triples Extension to Bogoliubov Coupled Cluster (.odp, .pdf)
Aug 28	Hannah	Uncertainty quantification for the nuclear equation of state
July 31	Alex	Orbital entanglement in atomic nuclei
July 24	Catharina	Two-body currents at finite momentum transfer and applications to M1 transition
July 17	Isak	The Fast and the Rigorous - A family of predictions
July 03	Yannick	Revisiting the EOS of EM500(1.8/2.0)
June 05	Margarida	Application of eigenvector continuation to nuclear many-body problems
May 29	Faruk	Neutron matter properties from Fermi liquid theory
May 15	Melissa	Constraining the dense matter EOS with new NICER measurements and new chiral EFT inputs
May 08	Pierre	Dissecting calcium with the valence-space scalpel
Apr 29	Andrea	Ab initio description of monopole resonances in light- and medium-mass nuclei
Apr 17	Tom	proposal talk
Mar 20	Matthias	Search for new bosons with ytterbium isotope shifts
Feb 14	Tom	Uncertainty Quantification for nuclear structure calculations using low-resolution potentials
Feb 07	Yannick	N3LO 3N contributions for nuclear matter calculations in single-particle basis
Feb 05	Faruk	Fermi liquid theory based speed of sound of neutron matter using chiral EFT
Jan 24	Catharina	Two-body currents - short and sweet update
Jan 17	Margarida	Eigenvector continuation: Applications to the pairing Hamiltonian and LEC emulator

2023

Date	Speaker	Notes
Dec 20	Takayuki	Neutrinoless double-beta decay from valence-space in-medium similarity renormalization group
Dec 13	Hannah	Gaussian processes for the nuclear equation of state
Nov 24	Alex	Heavy nuclei from coupled cluster theory
Nov 15	Andrea	Ab initio description of monopole resonances in light- and medium-mass nuclei
Nov 01	Pierre	Low-momentum interactions: Bright light at the end of the tunnel
Oct 12	Max	Basis optimization for IMSRG calculations
July 12	Faruk	Microscopic calculations of Landau parameters from Fermi Liquid theory
July 05	Catharina	Two-body currents
June 14	Yannick	Nuclear Matter Equation of State from Delta-full Chiral Interactions
June 07	Hannah	Gaussian processes for the nuclear equation of state
May 24	Lars	Germany USA Density-matrix expansion Energy density functional
May 10	Matthias	IMSRG with diagrams (again)
May 03	Jonas	Phase coexistence at zero temperature
Apr 19	Faruk	Microscopic calculations of Landau parameters from Fermi Liquid theory
Apr 17	Yannick	Nuclear Equation of State from Δ-full Chiral Interactions
Apr 12	Samet	Impact of three-nucleon-force variations on nuclear matter saturation
Mar 31	Sabrina	EOS functional and phase transition
Mar 15	Margarida	Eigenvector continuation: Applications to the pairing Hamiltonian and LEC emulator
Mar 08	Takayuki	Two-body EM current effects in medium-mass nuclei
Feb 22	Hannah	Gaussian processes for the nuclear equation of state
Feb 15	Tyler	Missing higher-order terms in pQCD...and their impact on the NS-matter EOS
Feb 08	Pierre	On low-momentum interactions for medium-mass nuclei
Jan 25	Alex	Symmetry breaking in ab initio many-body theory

2022

Date	Speaker	Notes
Dec 14	Catharina	Double-β decay into excited final nucleus and two-body currents
Nov 30	Matthias	IMSRG(3): You Will (Not) Converge.
Nov 23	Sabrina	EOS functional for astrophysical applications
Nov 21	Lars	Energy density functionals with chiral EFT: overview & results
Nov 02	Takayuki	Nuclear anapole moments from ab initio calculations
Oct 12	Tyler	Constraints on Strong Phase Transitions in Neutron Stars
Sep 21	Alex	Bogoliubov many-body theory: From perturbation theory to coupled cluster
Sep 14	Pierre	Update on three-body forces
Aug 3	Jonas	Dilute proton solution
July 13	Jan	Updates and possible extensions for the Jacobi normal-ordering framework
July 06	Matthias	IMSRG with Diagrams
June 29	Lars	Optimization of an energy density functional
June 13	Kai	Microscopic constraints on the EOS: current status and perspectives
June 08	Takayuki	Status of two-body current application
May 25	Rodric	Electroweak observables with chiral EFT currents
May 11	Pierre	Exploring three-body forces parametrisation
Apr 27	Sabrina	EOS functional for astrophysical applications
Apr 20	Tyler	Fundamental QCD at high density constraints inference of the Neutron-star EOS
Apr 06	Alex	The nuclear density matrix renormalization group
Apr 01	Margarida	Eigenvector continuation for the pairing Hamiltonian
Mar 23	Jonas	Temperature dependence and phase transitions
Mar 16	Achim	New interactions and EOS brainstorming
Mar 10	Jan	Update and recent results for the Jacobi normal-ordering framework
Mar 03	Matthias	Progress on a scalable IMSRG(3) implementation
Feb 24	Lars	Chiral-EFT-based energy density functionals
Feb 17	Kai	Three-body scattering using wave-packet continuum discretization
Feb 10	Takayuki	Exploring nuclear shell structure from chiral EFT
Feb 03	Anna	Implications of nuclear matter calculations for neutron stars (Bachelor Thesis presentation)
Jan 27	Alex	Factorized many-body theory - A novel least-square ansatz
Jan 20	Pierre	Adventures up and down the nuclear chart
Jan 13	Rodric	Electroweak observables for A=3 with chiral EFT currents

2021

Date	Speaker	Notes
Dec 16	Catharina	Effective field theories for weak interactions with nuclei (Master Thesis presentation)
Dec 09	Tyler	Constraining allowed PTs in high-density QCD: Updates
Nov 11	Catharina	Neutrinoless double-beta decay from an EFT for heavy nuclei
Nov 04	Jonas	Asymmetric nuclear matter
Oct 28	Jan	Importance Truncation for the IMSRG (once again)
Oct 21	Kai	Update on 3NF normal ordering project
Oct 18	Matthias	A sparse approach to the IMSRG: Status and problems
Oct 07	Lars	Ab initio and DFT (again)
Sep 29	Florian	Effects of Phase Transitions on the Mass-Radius Relation of Neutron Stars
Sep 23	Corbinian	virtual farewell
Sep 09	Alex	Low-rank chiral interactions - Factorisation techniques in many-body theory
Sep 02	Rodric	Triton beta decay with chiral EFT currents
Aug 02	Margarida	Excited states from eigenvector continuation: the anharmonic oscillator
Jul 30	Pierre	Configuration-Interaction Monte Carlo with 3NF
Jul 22	Tyler	Constraining allowed PTs in high-density QCD
Jul 08	Sabrina	Constraining Neutron-Star Matter with Microscopic and Macroscopic Collisions
Jul 01	Catharina	Effective field theories for weak interactions with nuclei (Proposal presentation)
Jun 17	Jonas	Evaluation of MBPT diagrams
Jun 10	Jan	Importance Truncation in the IMSRG
May 31	Yannick	Bachelor presentation
May 20	Lars	Ab initio and DFT
May 06	Matthias	Status and perspectives on three-body operators in the IMSRG
Apr 29	Corbinian	Pions in nuclear matter
Apr 22	Catharina	Neutrinoless double-beta decay from an effective field theory for heavy nuclei
Apr 15	Margarida	Application of Eigenvector Continuation to the Anharmonic Oscillator
Apr 08	Kai	Status on 3NF normal ordering project and impressions from the GPU Hackathon
Mar 25	Alex	Low-rank matrix decompositions in ab initio nuclear structure
Mar 18	Achim	Astrophysical constraints on the symmetry energy and the neutron skin of 208Pb with minimal modeling assumptions
Mar 12	Rodric	One- and two-body magnetic moment operator matrix elements with respect to a three-body basis
Mar 04	Tyler	Soft interactions in cold QM at NNNLO
Feb 25	Pierre	Formalism and automated generation for Bogoliubov IMSRG
Feb 18	Matthias	Analysis of three body effects in the in-medium similarity renormalization group
Feb 11	Sabrina	Constraining the EOS with multimessenger observations of neutron stars and heavy-ion collisions
Jan 28	Jan	Importance Truncation in the IMSRG
Jan 21	Jonas	Gaussian Processes
Jan 14	Yeunhwan	Neutron Star and Nuclear Equation of State

2020

Date	Speaker	Notes
Dec 17	Lars	Density-matrix expansion for 3N forces & DFT orbitals in IMSRG
Dec 10	Mirko	Exploring the equation of state beyond nuclear saturation density from neutron star observations (Master presentation)
Dec 03	Svenja	Constraining the nuclear equation of state from nuclear physics and neutron star observations
Nov 26	Corbinian	Renormalization of irrelevant interactions
Nov 23	Achim	Renormalization group advancesfor nuclei and strong interaction matter
Nov 12	Kai	Novel normal ordering framework for 3N interactions
Nov 05	Rodric	Doctoral defence rehearsal
Nov 02	Catharina	Neutrinoless double-beta decay from an effective field theory for heavy nuclei
Oct 27	Alex	Low-rank structure of nuclear interactions
Oct 23	Pierre	Generating many-body diagrams: The case for MBPT
Oct 21	Matthias	Analysis of three-body effects in the in-medium similarity renormalization group (Master presentation)
Oct 08	Tyler	EoS of NSs and pQCD
Oct 01	Lars	Comparing different density-matrix expansions for long-range pion exchange
Sep 17	Sabrina	EOS functional for astrophysical applications
Sep 10	Jonas	Asymmetric nuclear matter
Sep 03	Jan	Importance Truncation in the IMSRG
Aug 27	Yeunhwan	Nuclear matter properties and statistical modeling
Aug 20	Matthias	Some IMSRG(3) (preliminary) results
Aug 13	Svenja	EOS of asymmetric nuclear matter and beta equilibrium
Jul 16	Mirko	Fermi liquid theory vs. Fermi gas for neutrons
Jul 09	Rodric	Magnetic properties of light nuclei
Jul 02	Kai	Novel normal ordering framework for 3N interactions
Jun 18	Corbinian	ODME
Jun 04	Alex	Tensor-structured many-body theory
May 29	Achim
May 14	Sabrina	EOS constrained by nuclear physics, observations and high-density QCD calculations
May 07	Lars	Density-matrix expansions for scalar parts of one-body density matrices
Apr 29	Faruk	Wednesday 3pm, Bachelor talk
Apr 23	Mirko	Proposal talk
Apr 16	Matthias	9:30, Proposal talk
Apr 09	Jan	Properties of single-particle bases and applications in the IM-SRG
Apr 02	Hannah	Bachelor talk
Mar 26	Jonas	Neutron matter at finite temperatures
Mar 12	Yeunhwan	Nuclear pasta from finite range interactions
Feb 27	Svenja	Implications for the EOS from neutron star observation
Feb 13	Mirko	Neutron star properties and how to calculate them
Jan 30	Kai	Novel chiral 3N interactions for QMC and HO expansion methods
Jan 23	Rodric	Uncertainty quantification

2019

Date	Speaker	Notes
Dec 19	Matthias	Alternative SRG generators
Dec 12	Corbinian	From weak to strong coupling with perturbation theory (?)
Dec 05	Alex	Eigenvector continuation and the nuclear many-body problem
Nov 28	Achim	Correlations between nuclear properties, EOS, and neutron star properties
Nov 21	Sabrina	ASTREOS CACAO (ASTRophysical EOS Consistent with Ab initio CAlculations & Observations)
Nov 14	Jonas	Finite temperature equation of state
Nov 07	Kai	SRG evolution of 3N interactions vs. low-energy fits
Oct 24	Jan	Natural orbits and application in the IM-SRG
Oct 17	Catharina	Effective theory for beta-decays: Uncertainty quantification
Sep 12	Sebastian	Perturbation theory for few-body states
Sep 05	Svenja	EOS extrapolation and tidal deformability of neutron stars
Aug 29	Yeunhwan	Nuclear equation of state fot hot, dense matter
Aug 22	Lars	One-body density matrix & density-matrix expansion
Aug 08	Mirko	Speed of sound model and the pressure-radius relation
Jun 27	Matthias	Neural networks and Bayesian neural networks
Jun 13	Rodric	Two-body currents from chiral EFT
Jun 06	Corbinian	Extrapolation of EFT expansions & black magic
May 23	Achim	Spin-polarized neutron matter & maximum mass of neutron stars
May 16	Jan	EM transition strengths and moments in IM-SRG
May 08	Kai
Apr 24	Sebastian	Eigenvector continuation in nuclear physics
Apr 17	Svenja
Apr 03	Sabrina	Equation of state effects in core-collapse supernovae
Mar 13	Toño	Odd-mass axially-deformed nuclei
Mar 06	Matthias	SRG in a 1-Dimensional setting
Feb 20	Lars
Feb 13	Rodric	EM currents from chiral EFT in few-body systems
Jan 30	Victoria
Jan 23	Corbinian