BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Jesse Woods (University of Bern) DTSTART:20250919T070000Z DTEND:20250919T080000Z DTSTAMP:20260513T111828Z UID:EUPAC-TP/3 DESCRIPTION:Title: Defining QFT Categorically I\nby Jesse Woods (University of Bern) as part of Europe and Pacific Theoretical Physics\n\n\nAbstract\nIn preparati on to study Generalised (Categorical) Symmetries\, we provide motivation a nd give an introduction to some very basic\, but relevant\, concepts in Ca tegory Theory. We will introduce monoidal categories before showing that t he expected properties of Topological Quantum Field Theory follow naturall y from a categorical definition. We compute some basic results of TQFT to demonstrate the utility of categories in physics.\n LOCATION:https://researchseminars.org/talk/EUPAC-TP/3/ END:VEVENT BEGIN:VEVENT SUMMARY:Jonathan Skelton (University of Sydney) DTSTART:20250926T070000Z DTEND:20250926T080000Z DTSTAMP:20260513T111828Z UID:EUPAC-TP/5 DESCRIPTION:Title: Symmetries as Topological Operators\nby Jonathan Skelton (University of Sydney) as part of Europe and Pacific Theoretical Physics\n\n\nAbstract \nIn this talk I'll discuss extended symmetry defect operators and how the y naturally arise from symmetries in the quantum theory.\n\nThe focus will be on ordinary symmetries\; these are referred to as 0-form topological g roup-like symmetries in the modern literature. First I will discuss class ical symmetries of Lagrangian field theory. In the second part I will dis cuss their analogues in the quantised theory\, and outline and a sketch a proof of their properties.\n LOCATION:https://researchseminars.org/talk/EUPAC-TP/5/ END:VEVENT BEGIN:VEVENT SUMMARY:Joey Faller (University of Queensland) DTSTART:20251003T070000Z DTEND:20251003T080000Z DTSTAMP:20260513T111828Z UID:EUPAC-TP/6 DESCRIPTION:Title: One-Form Symmetries and Confinement\nby Joey Faller (University of Qu eensland) as part of Europe and Pacific Theoretical Physics\n\n\nAbstract\ nGlobal symmetries\, traditionally understood to act on local operators\, are a cornerstone of QFT. This talk provides a pedagogical introduction to their generalisation: higher-form symmetries\; these act on non-local\, e xtended operators like Wilson lines. We will begin by showing how the conc ept of a conserved charge can be extended from 0-form to 1-form symmetries and demonstrate that this framework is consistent with Noether's theorem. \n\nIn a gauge theory\, two principal types of 1-form symmetries can emerg e: a 'magnetic' symmetry of topological origin from the Bianchi identity ( $dF=0$)\, and an 'electric' symmetry arising from the dynamical equations of motion. It is this electric 1-form symmetry that provides a novel metho d to analyse confinement.\nThe primary application of this framework is to show how the status of this 1-form symmetry\, whether it is spontaneously broken or preserved\, precisely determines whether confinement is present or not.\n LOCATION:https://researchseminars.org/talk/EUPAC-TP/6/ END:VEVENT BEGIN:VEVENT SUMMARY:Adèle Le Borgne (University of Bern) DTSTART:20251010T070000Z DTEND:20251010T080000Z DTSTAMP:20260513T111828Z UID:EUPAC-TP/7 DESCRIPTION:Title: Landau-Ginzburg theory for 1-form symmetries\nby Adèle Le Borgne (Un iversity of Bern) as part of Europe and Pacific Theoretical Physics\n\n\nA bstract\nTo conclude the first block of seminars on higher form symmetry\, I will review the first four sections of $\\textbf{Mean string field theo ry: Landau-Ginzburg theory for 1-form symmetries}$ by Nabil Iqbal\, John M cGreevy.\n\n\n$\\textit{Abstract of the paper:}$ \n\nBy analogy with the L andau-Ginzburg theory of ordinary zero-form symmetries\, we introduce and develop a Landau-Ginzburg theory of one-form global symmetries\, which we call mean string field theory. The basic dynamical variable is a string fi eld – defined on the space of closed loops – that can be used to descr ibe the creation\, annihilation\, and condensation of effective strings. L ike its zero-form cousin\, the mean string field theory provides a useful picture of the phase diagram of broken and unbroken phases. We provide a t ransparent derivation of the area law for charged line operators in the un broken phase and describe the dynamics of gapless Goldstone modes in the b roken phase. The framework also provides a theory of topological defects o f the broken phase and a description of the phase transition that should b e valid above an upper critical dimension\, which we discuss. We also disc uss general consequences of emergent one-form symmetries at zero and finit e temperature.\n LOCATION:https://researchseminars.org/talk/EUPAC-TP/7/ END:VEVENT BEGIN:VEVENT SUMMARY:Jonathan Skelton DTSTART:20251017T070000Z DTEND:20251017T080000Z DTSTAMP:20260513T111828Z UID:EUPAC-TP/8 DESCRIPTION:Title: Non-invertible Chiral Symmetry and the ABJ Anomaly\nby Jonathan Skelt on as part of Europe and Pacific Theoretical Physics\n\n\nAbstract\nIn thi s talk I will derive the chiral (ABJ) anomaly\, and briefly outline its co nnection to non-invertible (generalised) symmetries.\n LOCATION:https://researchseminars.org/talk/EUPAC-TP/8/ END:VEVENT BEGIN:VEVENT SUMMARY:Jesse Woods (University of Bern) DTSTART:20251024T070000Z DTEND:20251024T080000Z DTSTAMP:20260513T111828Z UID:EUPAC-TP/9 DESCRIPTION:Title: Degenerate Ground States\nby Jesse Woods (University of Bern) as part of Europe and Pacific Theoretical Physics\n\n\nAbstract\nDespite their co mmon occurrence in our studies\, degenerate spectra are rare and special. In this talk\, we will briefly sketch the argument of eigenvalue repulsion and explain why degenerate Hamiltonians are not the norm. We will also de monstrate how familiar mechanisms for degeneracy fail in Quantum Mechanics . Next\, anomalies will be discussed as an invariant for diagnosing degene racy. To conclude\, we will discuss projective representations and how to realise anyon parastatics on the torus and the associated ground state deg eneracy\, to set the scene for future discussions on fusion\, anomalies\, and inflow.\n LOCATION:https://researchseminars.org/talk/EUPAC-TP/9/ END:VEVENT BEGIN:VEVENT SUMMARY:Jesse Woods (University of Bern) DTSTART:20251031T080000Z DTEND:20251031T090000Z DTSTAMP:20260513T111828Z UID:EUPAC-TP/10 DESCRIPTION:Title: Anomalies and Inflow I\nby Jesse Woods (University of Bern) as part of Europe and Pacific Theoretical Physics\n\n\nAbstract\nWe introduce anom alies as non-trivial fusions of symmetry defects. We introduce the inflow mechanism and the mapping torus.\n LOCATION:https://researchseminars.org/talk/EUPAC-TP/10/ END:VEVENT BEGIN:VEVENT SUMMARY:Jonathan Skelton DTSTART:20251107T080000Z DTEND:20251107T093000Z DTSTAMP:20260513T111828Z UID:EUPAC-TP/11 DESCRIPTION:Title: Anomalies and Inflow II\nby Jonathan Skelton as part of Europe and P acific Theoretical Physics\n\nAbstract: TBA\n LOCATION:https://researchseminars.org/talk/EUPAC-TP/11/ END:VEVENT BEGIN:VEVENT SUMMARY:Lukasz T. Stepien (University of the National Education Commission \, Krakow) DTSTART:20260327T080000Z DTEND:20260327T090000Z DTSTAMP:20260513T111828Z UID:EUPAC-TP/17 DESCRIPTION:Title: Bogomolny equations for some field-theoretical models\nby Lukasz T. Stepien (University of the National Education Commission\, Krakow) as part of Europe and Pacific Theoretical Physics\n\n\nAbstract\nThe Bogomolny eq uations\, if they can be derived for a given field-theoretical model\, giv e a valuable chance for seeking topologically stable soliton solutions for such model. I will present a method based on variational calculus\, of de riving Bogomolny equations for some field-theoretical models\, and certain solutions of these equations\, too.\n LOCATION:https://researchseminars.org/talk/EUPAC-TP/17/ END:VEVENT BEGIN:VEVENT SUMMARY:Bartosz Pyszkowski DTSTART:20260417T070000Z DTEND:20260417T080000Z DTSTAMP:20260513T111828Z UID:EUPAC-TP/20 DESCRIPTION:Title: An Introduction to Double String Theory and Non-Riemannian Backgrounds\nby Bartosz Pyszkowski as part of Europe and Pacific Theoretical Physic s\n\n\nAbstract\nThis talk introduces Double Field Theory (DFT) in the con text of string theory\, with a focus on its application to "non-Riemannian " backgrounds following arXiv:2008.03084. As a case study\, we consider a particular example in which the BRST cohomology simplifies\, containing on ly states at the first excited level. We then briefly examine the consiste ncy of the theory by analyzing the modular invariance of the one-loop toru s partition function. To keep the discussion pedagogical\, a brief review of BRST quantization and modular invariance in string theory will be provi ded. No prior familiarity with DFT is assumed\, and all are welcome.\n LOCATION:https://researchseminars.org/talk/EUPAC-TP/20/ END:VEVENT BEGIN:VEVENT SUMMARY:Adèle Le Borgne (University of Bern) DTSTART:20260515T070000Z DTEND:20260515T080000Z DTSTAMP:20260513T111828Z UID:EUPAC-TP/29 DESCRIPTION:Title: Trapping-potential dependence of the unitary Fermi gas at the BCS-BEC cr ossover\nby Adèle Le Borgne (University of Bern) as part of Europe an d Pacific Theoretical Physics\n\n\nAbstract\nCold-atom experiments which m easure Fermi-gas properties near unitarity confine fermionic atoms to a re gion of space using trapping potentials of various shapes. The presence of a trapping potential introduces a new characteristic physical scale in th e superfluid EFT which\, inter alia\, describes the acoustic branch of exc itations in the far infrared well below the scale of the superfluid gap. I n this EFT there is a clear hierarchy of scales\, and corrections to the h omogeneous system due to the trapping potential may be organized into thre e regions with distinct power counting that relies on both the EFT derivat ive expansion\, and the WKB approximation\, which is an expansion in gradi ents of the trapping potential. The energy spectrum of the superfluid syst em is obtained in each of the regions by explicit computation of the phono n-field fluctuations\, and by the modifications to the dynamic structure f actor due to the corresponding density fluctuations. The most significant deviations from linear dispersion due to the trapping potential are found in the far infrared region of the superfluid EFT.\n LOCATION:https://researchseminars.org/talk/EUPAC-TP/29/ END:VEVENT BEGIN:VEVENT SUMMARY:Jesse Woods (University of Bern) DTSTART:20260522T070000Z DTEND:20260522T080000Z DTSTAMP:20260513T111828Z UID:EUPAC-TP/30 DESCRIPTION:Title: Semiclassics at the Cusp\nby Jesse Woods (University of Bern) as par t of Europe and Pacific Theoretical Physics\n\n\nAbstract\nIn gauge theory \, physical observables are inherently non-local and notoriously subtle. W ilson loops play a central role in understanding non-perturbative phenomen a spanning high-energy and condensed matter physics. We explore the recent results of arXiv:2604.15422. Using the semiclassical method of large char ge\, we analytically determine the anomalous scaling dimension of Wilson l ines with cusps in the Abelian Higgs model to NNLO\, resumming perturbatio n theory in the quartic coupling at each order. This quantity encodes rich physics: radiation from deflected particles\, defect fusion\, and the sup erconducting phase transition. Our results interpolate between perturbativ e and large-charge regimes\, accessing domains that are invisible in fixed -order perturbation theory\, bridging perturbative and non-perturbative ph ysics in strongly coupled CFTs.\n LOCATION:https://researchseminars.org/talk/EUPAC-TP/30/ END:VEVENT BEGIN:VEVENT SUMMARY:Alessandro Duci (Milan Bicocca U) DTSTART:20260605T070000Z DTEND:20260605T080000Z DTSTAMP:20260513T111828Z UID:EUPAC-TP/31 DESCRIPTION:Title: SymTFT in Superspace\nby Alessandro Duci (Milan Bicocca U) as part o f Europe and Pacific Theoretical Physics\n\n\nAbstract\nWe propose a manif estly supersymmetric formulation of the Symmetry Topological Field Theory (SuSymTFT) for theories with supersymmetry. The SymTFT is a framework that helps organizing symmetries and anomalies of a QFT. Albeit a lot of activ ity in the field has been devoted to the construction of the SymTFT for th e bosonic symmetry structure\, the fermionic case has not been analyzed in detail. Here\, we consider the most prominent example of theories exhibit ing fermionic symmetries\, that is supersymmetric models. These are most n aturally formulated on supermanifolds\, where the supergeometry approach a llows for a manifest organization of the symmetries according to their fer mionic grading. We provide the general construction of the SuSymTFT as a s uper-BF theory living in a (n|m)-dimensional supermanifold and check our p roposal in two particular examples\, the compact and the chiral super-boso ns in two dimensions.\n LOCATION:https://researchseminars.org/talk/EUPAC-TP/31/ END:VEVENT BEGIN:VEVENT SUMMARY:Zong-Zhe Du (University of Notthingham) DTSTART:20260529T070000Z DTEND:20260529T080000Z DTSTAMP:20260513T111828Z UID:EUPAC-TP/32 DESCRIPTION:by Zong-Zhe Du (University of Notthingham) as part of Europe a nd Pacific Theoretical Physics\n\nAbstract: TBA\n LOCATION:https://researchseminars.org/talk/EUPAC-TP/32/ END:VEVENT END:VCALENDAR