Málstofa í stærðfræði Fyrirlesari: François David Titill: Planar maps, circle patterns and 2D gravity Staðsetning: V-157, VRII. Tími: Föstudagur 11. mars kl. 13:20. Ágrip: I present a model of random planar triangulations (planar maps) based on circle patterns and discuss its properties. It exemplifies the relations between discrete random geometries in the plane, conformally invariant […]
kennileg eðlisfræði
Málstofa í stærðfræði Fyrirlesari: Matin Mojaza Titill: Soft dilatons: In gravity and from conformal field theory Staðsetning: V-148, VRII. Tími: Föstudagur 19. febrúar kl. 11:00. Ágrip: In this talk I will discuss the soft factorizing properties of two seemingly different particles, which are in the literature both referred to as dilatons; i.e. the dilaton in
Málstofa í stærðfræði Fyrirlesari: Eric Laenen Titill: The Eikonal Approximation Staðsetning: V-156, VRII. Tími: Miðvikudagur 28. október, klukkan 15:00-16:00. Ágrip: In LHC processes, when low-energy gluons are radiated, the so-called eikonal approximation may be used. In this talk I review its origin, how it works, and show some insights that emerge from it. I then
Málstofa í stærðfræði Fyrirlesari: David Tong Titill: The Supersymmetric Quantum Hall Effect Staðsetning: Naustið, Endurmenntun. Tími: Þriðjudagur 25. ágúst, klukkan 15:00-16:00. Ágrip: I’ll describe the solution to a supersymmetric, but non-relativistic, gauge theory in d=2+1 dimensions. The ground states are given by the Laughlin wavefunctions describing the fractional quantum Hall effect. The model reveals explicit
Málstofa í stærðfræði Fyrirlesari: Oleg Evnin Titill: Non-linear perturbations of AdS space-time Staðsetning: VR-II, 147. Tímasetning: Þriðjudaginn 30. júní, klukkan 15:00-16:00. Ágrip: Recent, mostly numerical investigations have revealed a complex interplay of stability and instability in the dynamics of classical AdS perturbations. I’ll review some attempts to develop an analytic understanding of these fascinating phenomena,
Málstofa í stærðfræði Speaker: Ville Keränen, University of Oxford Title: Thermalization in the AdS/CFT duality Staðsetning: V-155, VR-II Tími: Mánudaginn 18. maí, klukkan 15:00-16:00. Ágrip: The AdS/CFT duality relates the dynamics of certain strongly interacting quantum field theories to the dynamics of certain gravitational theories in spacetimes with one higher dimension. Thus, it provides an
Málstofa í stærðfræði Fyrirlesari: David Lowe Titill: Cosmology from conformal field theory Staðsetning: VR-156 Tími: Þriðjudagur 31. febrúar, frá 15:00-16:00. Ágrip: Our universe appears to be entering a de Sitter phase, where expansion becomes dark energy dominated. In this limit, the isometries of the spacetime are the same as the conformal group. There exists an
Málstofa í stærðfræði Fyrirlesari: Þórður Jónsson, Háskóli Íslands Titill: Exponential bounds on the number of triangulations Staðsetning: Naustið, Endurmenntun (hér) Tími: Fimmtudagur 26. febrúar, frá 15:00-16:00. Ágrip: We discuss the problem of bounding the number of 3-dimensional triangulations of the sphere as a function of the number of tetrahedra. We show how to establish an
Razieh Pourhasan (26/02/15)Razieh Pourhasan (26/02/15)
Málstofa í stærðfræði Fyrirlesari: Razieh Pourhasan, Háskóli Íslands Titill: Out of the white hole: a holographic origin for the Big Bang Staðsetning: Naustið, Endurmenntun (hér) Tími: Fimmtudagur 26. febrúar, frá 15:00-16:00. Ágrip: While most of the singularities of General Relativity are expected to be safely hidden behind the event horizons by the cosmic censorship conjecture,
Razieh Pourhasan (26/02/15)Razieh Pourhasan (26/02/15) Read More »