BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Elli Pomoni (DESY) DTSTART:20211014T144500Z DTEND:20211014T163000Z DTSTAMP:20260423T022718Z UID:LIJC/49 DESCRIPTION:Title: Dy namical spin chains in 4D N = 2 SCFTs\nby Elli Pomoni (DESY) as part o f London Integrability Journal Club\n\n\nAbstract\nIn this talk we will re visit the study of spin chains capturing the spectral problem of 4d N = 2 SCFTs in the planar limit. At one loop and in the quantum plane limit\, we will discover a quasi-Hopf symmetry algebra\, defined by the R-matrix rea d off from the superpotential. This implies that when orbifolding the N = 4 symmetry algebra down to the N = 2 one and then marginaly deforming\, th e broken generators are not lost\, but get upgraded to quantum generators. We will also demonstrate that these chains are dynamical\, in the sense t hat their Hamiltonian depends on a parameter which is dynamically determin ed along the chain. At one loop we will show how to map the holomorphic SU (3) scalar sector to a dynamical 15-vertex model\, which corresponds to an RSOS model\, whose adjacency graph can be read off from the gauge theory quiver/brane tiling. One scalar SU(2) sub-sector is described by an altern ating nearest-neighbour Hamiltonian\, while another choice of SU(2) sub-se ctor leads to a dynamical dilute Temperley-Lieb model. These sectors have a common vacuum state\, around which the magnon dispersion relations are n aturally uniformised by elliptic functions. For the example of the ℤ_{2} quiver theory we study these dynamical chains by solving the one- and two -magnon problems with the coordinate Bethe ansatz approach.\n LOCATION:https://researchseminars.org/talk/LIJC/49/ END:VEVENT END:VCALENDAR