# Group Seminar

During the term our group seminar takes place Wednesdays at 4 pm in room SR 02.729. Speakers in the group seminar are external researchers who are visiting our group as well as group members who present ongoing research projects. The current schedule of our group seminars can be found below.

## Group seminars SS 2017

Title | Time | Room | Speaker |

"About non standard boundary conditions" |
Wed, 5 Apr 14:00-15:30 |
SR 02.729 | Juan Margalef Universidad Carlos III de Madrid, Spain |

"Feasibility of probing the quantum universe dynamics through midisuperspaces in loop quantization." |
Wed, 31 May 11:00-12:00 |
SR 02.729 | Dr. Tomasz Pawlowski University of Warsaw |

"A non-singular cosmic super-bounce" |
Thu, 8 Jun 16:00-18:00 |
HE | Dr. Michael Koehn FAU |

"Modern Classification of Knot Invariants" | Wed, 14 Jun 16:00-18:00 |
SR 02.729 | Klaus Liegener FAU |

"Geometry, constraints and boundaries. It takes three to tango." |
Wed, 21 Jun 16:00-17:30 |
HF | Juan Margalef Universidad Carlos III de Madrid, Spain |

"Uniqueness of the Representation in Homogeneous Isotropic LQC" |
Wed, 28 Jun 16:00-18:00 |
SR 02.729 | Prof. Jonathan Engle Florida Atlantic University |

"Talks Loops'17" | Wed, 5 Jul 16:00-17:30 |
SR 02.729 | Several |

"Loops17: Analysis" |
Wed, 12 Jul 16:00-18:00 |
SR 02.729 | Thomas Thiemann FAU |

"Finite Projective Geometry as a Quantum World with Elementary Particles" | Tue, 25 Jul 14:00-16:00 |
SR 01.683 | Prof. Klaus Mecke FAU |

"Unitary dynamics as a uniqueness criterion for the quantization of Dirac fields" |
Wed, 26 Jul 16:00-18:00 |
SR 02.729 | Dr. Beatriz Elizaga de Navascues Instituto de Estructura de la Materia, CSIC |

"A comparison of symmetry reduction before and after quantization" |
Wed, 26 Jul 18:00-20:00 |
SR 02.729 | Dr. Antonia Zipfel Florida Atlantic University, USA |

## Group seminars WS 2016/17

Title | Time | Room | Speaker |

"Polarization-less quantization of free field theories" |
Tue, 18 Oct 16:00-17:30 |
SR 02.729 | Dr. Suzanne Lanery Centro de Ciencias Matematicas UNAM, Campus Morelia |

"Renormalization of hypercuboidal spin foams" |
Wed, 7 Dec 16:00-17:30 |
SR 02.729 | Dr. Sebastian Steinhaus Hamburg University |

"State refinements and coarse graining in a full theory embedding of loop quantum cosmology" |
Wed, 14 Dec 18:00-19:30 |
SR 02.729 | Dr. Norbert Bodendorfer LMU |

"Deformed Poincare Group of an Observer" | Tue, 7 Feb 16:00-17:30 |
SR 02.779 | Prof. Dr. Jerzy Lewandowski Warsaw University |

"Towards a Hartle-Hawking state for loop quantum gravity" | Fri, 24 Feb 14:30-15:30 |
02.729 | Satya Dhandhukiya FAU Erlangen-Nürnberg |

"The Schrödinger equation of the polarized three-torus Gowdy model in algebraic quantum gravity" |
Wed, 15 Mar 10:30-12:00 |
SR 02.729 | Andreas Leitherer FAU Erlangen, Germany |

"Geometrical Clocks in Cosmological Perturbation Theory" |
Wed, 22 Mar 14:00-15:30 |
SR 02.729 | Adrian Herzog FAU Erlangen, Germany |

## Group seminars SS 2016

Title | Time | Room | Speaker |

"Perturbative solution of construction equations: general method and application" | Fri, 8 Apr 10:00-11:00 |
SR 02.729 | Alexander Wierzba Ludwig-Maximilian Universität |

"Kinematical uniqueness of loop quantum cosmology" | Wed, 11 May 16:00-17:30 |
SR 02.729 | Prof. Dr. Jon Engle Florida Atlantic University, USA |

"The Erlangen Programme and General Relativity" |
Tue, 31 May 16:00-17:30 |
SR 02.729 | Dr. Derek Wise Concordia U., USA |

"Perturbative canonical gravitational dynamics for birefringent spacetimes" | Thu, 14 Jul 10:45-11:45 |
SR 02.729 | Nadine Stritzelberger FAU Erlangen, Germany |

"On the compatibility of black hole area spectra with quasinormal mode frequencies in loop quantum gravity" | Fri, 30 Sep 11:00-12:00 |
SR 02.729 | Benjamin Lotter FAU Erlangen-Nürnberg |

## Group seminars WS 2015/16

Title | Time | Room | Speaker |

"Projective State Spaces for Theories of Connections [PhD defence]" | Fri, 9 Oct 09:00-09:45 |
SR 02.729 | Suzanne Lanéry IQG, FAU Erlangen, Germany |

"Geometric properties of the Livine-Speziale coherent intertwiner [Bachelor defense]" | Fri, 16 Oct 09:00-10:00 |
SR 02.729 | Robert Seeger FAU Erlangen-Nürnberg |

"Quantum Gravity: rainbows and other ideas" | Tue, 20 Oct 16:00-17:30 |
SR 02.729 | Andrea Dapor FAU Erlangen, Germany |

"Heat kernel coherent states on SU(3)" | Tue, 27 Oct 16:00-17:00 |
SR 02.729 | Thorsten Lang FAU Erlangen, Germany |

"Dynamical wave function reduction theories and various open issues at the interface between gravitation and quantum theory" | Mon, 22 Feb 13:30-14:30 |
SR 02.729 | Prof. Dr. Daniel Sudarsky UNAM Mexico City |

"Construction equations for cosmologically symmetric area metric gravity" |
Wed, 9 Mar 10:00-11:00 |
SR 02.729 | Maximilian Düll FAU Erlangen, Germany |

## Group seminars SS 2015

Title | Time | Room | Speaker |

"On the Embedding of Quantum Field Theory on Curved Spacetimes into Loop Quantum Gravity [PhD defence]" | Wed, 15 Jul 12:00-12:45 |
SR 00.581, Lehrstuhl für Zellbiologie, B1 | Alexander Stottmeister IQG, FAU Erlangen, Germany |

"Homogeneity and Isotropy in non-embedded LQG" | Wed, 22 Jul 14:00-15:30 |
SR 02.729 | Dr. Jonathan Engle Florida Atlantic University |

"The Physical Hamiltonian of the Gowdy Model in Algebraic Quantum Gravity" | Thu, 17 Sep 10:00-11:00 |
SR 02.729 | Benedikt Böhm FAU Erlangen, Germany |

"Algebraic Loop Quantisation of the Gowdy Model: The Master Constraint" | Thu, 17 Sep 11:00-12:00 |
SR 02.729 | Nils Alex FAU Erlangen, Germany |

"On Spatially Diffeomorphism Invariant Quantizations of the Bosonic String" | Thu, 17 Sep 14:00-15:00 |
SR 02.729 | Florian Wolz FAU Erlangen, Germany |

"Quantum Tetrahedron and Loop Quantum Gravity:The Monochromatic Four-Vertex" | Fri, 18 Sep 14:00-15:00 |
SR 02.729 | Konstantin Eder FAU Erlangen, Germany |

## Group seminars WS 2014/15

Title | Time | Room | Speaker |

"Geometrische Eigenschaften der Verschränkungsentropie in der Loop-Quantengravitation (Bachelorkolloquium, in German)" | Wed, 1 Oct 10:00-11:00 |
SR 02.729 | Nadine Stritzelberger FAU IQG |

"How the dynamics of matter determines the dynamics of gravity" | Wed, 8 Oct 16:00-17:30 |
SR 02.729 | Dr. Frederic Schuller IQG, FAU Erlangen |

"Chern-Simons Theory, Flat Connections and 4d Quantum Geometry" |
Wed, 19 Nov 16:00-17:00 |
SR 02.729 | Prof. Muxin Han FAU Erlangen, Germany |

"Discrete quantum geometries and their effective dimension" | Wed, 3 Dec 14:00-15:00 |
SR 01.683 | Johannes Thürigen MPI für Gravitationsphysik |

"Quantum theory and spacetime: an operational perspective" |
Tue, 9 Dec 14:00-15:30 |
SR 02.729 | Dr. Markus Müller Universität Heidelberg |

"Towards the Turaev-Viro amplitudes from a Hamiltonian constraint" |
Wed, 17 Dec 16:00-17:00 |
SR 02.729 | Dr. Maïté Dupuis University of Waterloo |

"Symmetry reductions in loop quantum gravity based on classical gauge fixings (blackboard talk)" |
Wed, 7 Jan 16:00-17:00 |
SR 02.729 | Dr. Norbert Bodendorfer University of Warsaw |

"First-order Dipole Cosmology in the limit of large volume of the universe" |
Wed, 14 Jan 16:00-17:00 |
SR 02.729 | Dr. Marcin Kisielowski FAU Erlangen, Germany |

"Masterkolloquium: Psi-epistemic hidden variable theories" | Mon, 19 Jan 14:30-15:30 |
SR 02.779 (!) | Markus Frembs FAU Erlangen, Germany |

## Group seminars SS 2014

Title | Time | Room | Speaker |

"The Large-Volume Limit of a Quantum Tetrahedron is a Quantum Harmonic Oscillator" | Wed, 16 Apr 16:00-17:30 |
SR 02.729 | Prof. John Schliemann Universität Regensburg |

"Regge state-sum models of quantum gravity" | Wed, 14 May 16:00-17:30 |
SR 02.729 | Dr. Aleksandar Mikovic Lusófona University and GFM - University of Lisbon |

"A Larger State Space for LQG" |
Wed, 21 May 16:00-17:30 |
SR 02.729 | Suzanne Lanéry IQG, FAU Erlangen |

"Turaev-Viro amplitudes from 2+1 Loop Quantum Gravity" |
Wed, 4 Jun 16:00-17:30 |
SR 02.729 | Dr. Daniele Pranzetti IQG, FAU Erlangen |

"Towards the fundamental spectrum of Quantum Yang-Mills Theory (Master Colloquium)" |
Wed, 25 Jun 16:00-17:30 |
SR 02.729 | Klaus Liegener IQG, FAU Erlangen |

"Gaussian measures and representations of the holonomy-flux algebra" |
Mon, 22 Sep 10:00-11:00 |
SR 02.729 | Stefan Nekovar IQG FAU Erlangen |

"Effective formulations for (canonical) Quantum Theories" |
Mon, 22 Sep 11:00-12:00 |
SR 02.729 | Suddhasattwa Brahma Pennsylvania State University |

## Group seminars WS 2013/14

Title | Time | Room | Speaker |

"Topological parameters in gravity" |
Wed, 9 Oct 14:00-15:30 |
SR 02.729 | Dr. Sandipan Sengupta Raman Research Institute, Bangalore, India |

"General covariant foundations of quantum theory: The general boundary formulation" |
Wed, 23 Oct 16:30-18:00 |
SR 02.729 | Prof. Robert Oeckl Centro de Ciencias Matemáticas, UNAM Morelia, Mexico |

"Symmetry Reducing Loop Quantum Gravity" |
Wed, 30 Oct 16:30-18:00 |
SR 02.729 | Maximillian Hanusch Universität Paderborn |

"Cosmology with group field theory condensates" |
Wed, 13 Nov 16:30-17:30 |
SR 02.729 | Dr. Steffen Gielen Perimeter Institute |

"Higher dimensional and supersymmetric extensions of loop quantum gravity (PhD defence)" | Fri, 15 Nov 08:15-09:45 |
SR 01.178 | Andreas Thurn IQG, FAU Erlangen |

"Deformed Phase Space for 3d gravity" |
Tue, 19 Nov 12:30-13:30 |
SR 02.729 | Dr. Maïté Dupuis University of Waterloo |

"Gauge Symmetric Higher derivative theories" |
Wed, 20 Nov 14:15-15:45 |
SR 02.779 (!) | Biswajit Paul S.N.Bose National Centre for Basic Sciences, Kolkata, India |

"Null Twisted Geometry" |
Wed, 4 Dec 16:30-17:30 |
SR 02.729 | Mingyi Zhang |

"Exact evaluations of coherent spin networks and spin foams" | Thu, 5 Dec 14:30-15:45 |
SR 01.683 (!) | Jeff Hnybida Perimeter Institute |

"The quantization of submanifold embeddings" |
Fri, 6 Dec 12:30-14:00 |
SR 02.779 (!) | Dr. Jochen Zahn Universität Wien |

"Time dependent solutions of the massless Gross-Neveu model (PhD defence)" | Fri, 6 Dec 14:00-16:00 |
SRTL 307 | Christian Fitzner |

"Refinement limit of spin net / spin foam models with quantum groups" |
Mon, 9 Dec 11:00-12:00 |
SR 02.729 | Sebastian Steinhaus Perimeter Institute |

"Nonperturbative Renormalization Group approaches to quantum gravity" |
Tue, 10 Dec 12:15-13:45 |
SR 00.732 (!) | Dr. Astrid Eichhorn Perimeter Institute for Theoretical Physics |

"Mode decomposition and Fourier analysis of physical fields in homogeneous cosmology" | Mon, 16 Dec 11:00-12:00 |
SR 02.729 | Dr. Zhirayr Avetisyan MPI Leipzig |

"Locality in Causal Sets" |
Mon, 16 Dec 13:30-14:30 |
SR 02.729 | Lisa Glaser Nils Bohr Institute |

"Classically Consistent Theories of Interacting Spin-2 Fields" |
Wed, 18 Dec 16:30-18:00 |
SR 02.729 | Angnis Schmidt-May Stockholm University |

"What is the hydrogen atom of quantum field theory" |
Thu, 16 Jan 17:00-18:30 |
SR 01.332 (!) | Prof. Michael Thies IQG, FAU Erlangen |

"Geometry of 4-valent spin networks with spin 1/2 (Bachelorkolloquium)" | Mon, 3 Feb 15:00-16:00 |
SR 02.729 | Henning Stumpf FAU IQG |

"Semiclassical perturbation theory within loop quantum gravity (Masterkolloquium)" |
Mon, 3 Feb 16:00-17:00 |
SR 02.729 | David Winnekens FAU IQG |

## Group seminars SS 2013

Title | Time | Room | Speaker |

"Dynamical evaporation of quantum horizons" |
Wed, 17 Apr 16:00-17:00 |
SR 02.729 | Dr. Daniel Pranzetti Max-Planck-Instistute for Gravitational Physics, Potsdam |

"Unbroken Discrete Supersymmetry" |
Wed, 24 Apr 16:00-17:00 |
SR 02.729 | Dr. Gerhart Seidl FAU Erlangen |

"Loop quantisation of supergravity theories (PhD defence)" | Tue, 30 Apr 16:00-17:30 |
SRTL 307 | Norbert Bodendorfer PennState University |

"Segal's axioms of a Conformal Field Theory" |
Mon, 6 May 16:15-17:45 |
Übungsraum 4, Department Mathematik, Cauerstr. 11 | Stefan Wiedenmann FAU Erlangen-Nürnberg |

"Relational Evolution of Observables for Hamiltonian-Constrained Systems" |
Wed, 15 May 16:00-17:00 |
SR 02.729 | Prof. Jerzy Lewandowski University of Warsaw |

"Tensor operators for the Lorentz group in (2+1) loop quantum gravity" |
Wed, 19 Jun 16:00-17:00 |
SR 02.729 | Giuseppe Sellaroli University of Waterloo |

"Tensor operators in LQG" |
Wed, 26 Jun 16:00-17:00 |
SR 02.729 | Dr. Florian Girelli University of Waterloo |

## Group seminars WS 2012/13

Title | Time | Room | Speaker |

"Multimetric cosmology and structure formation" |
Wed, 21 Nov 16:00-17:30 |
Übungsraum 5, Department Mathematik, Cauerstr. 11 | Dr. Manuel Hohmann Tartu University |

"Complete quantization of an inflationary scenario with scalar perturbations" |
Wed, 21 Nov 17:30-18:30 |
SR 02.729 | Mikel Fernández Méndez Instituto de Estructura de la Materia - CSIC |

"Topics in LQC" |
Wed, 5 Dec 17:00-18:30 |
SR 02.729 | Miguel Campiglia Institute for Gravitation and the Cosmos, Pennstate University |

"Shape Dynamics" |
Wed, 19 Dec 17:00-18:30 |
SR 02.729 | Dr. Tim Koslowski University of New Brunswick, Fredericton, Canada |

"Transition amplitude in Dipole Cosmology: first order calculations" | Tue, 22 Jan 12:00-13:00 |
SR 02.779 | Marcin Kisielowski University of Warsaw |

"From Finslerian time measures to Finsler geometric gravity" |
Tue, 22 Jan 13:00-14:00 |
SR 02.779 | Christian Pfeifer Universität Hamburg |

"Symmetric Subsets of the LQG Configuration Space" |
Mon, 28 Jan 17:00-18:00 |
SR 02.729 | Prof. Christian Fleischhack Universität Paderborn |

"Quantum Mechanics in the Polymer Particle Representation" | Fri, 8 Feb 11:00-12:00 |
SR 02.729 | Thorsten Reichert IQG, Uni Erlangen |

"Manifestly gauge-invariant cosmological perturbation theory" | Wed, 27 Mar 14:00-15:00 |
SR 02.729 | Thomas Zilker IQG Erlangen |