Archive of IAS Monday High Energy Theory Seminars

Abstract: We will discuss excitations with large spin and/or large particle number. For conformal theories this corresponds to investigating particular trajectories of heavy operators. 

We find trajectories with large approximate degeneracy and show...

Abstract: Conformal Field Theory (CFT) represents a class of quantum field theories that has profound applications across various physics domains, from critical phenomena in statistical mechanics to quantum matter, quantum gravity, and string theory...

Abstract: String stars, or Horowitz-Polchinski solutions, are string theory saddles with normalizable condensates of thermal-winding strings. In the past, string stars were offered as a possible description of stringy (Euclidean) black holes in...

Abstract: M- and F-theory compactifications with ADE singularities give rise to non-abelian ADE gauge symmetries. The physical explanation for this phenomenon involves M2-branes wrapped on vanishing cycles. We consider an alternative approach which...

Abstract: Instantons are an important source of nonperturbative effects in quantum field theories, but their role in asymptotically free theories has not been well understood. In this talk, we will present a new approach to instanton analysis in the...

Abstract: Kinematically, massless particles in Lorentz-invariant theories are classified by a dimensionful "spin scale"ρ  (2nd Casimir invariant) that characterizes helicity states' mixing under little group transformations.  However, dynamics for...

Abstract: We add non-linear and state-dependent terms to the Hamiltonian of quantum field theory. The resulting low-energy theory, non-linear quantum mechanics, is causal, preserves probability and permits a consistent description of the process of...

This seminar will be presented on Zoom.
https://theias.zoom.us/j/84116605050?pwd=VHV6VkRUM3hkM2dFSlo2QWJiUWtPdz09

Abstract: Perhaps the most important problem in physics or quantum chemistry is to determine properties of the ground state of an...

This seminar will be presented in-person and on Zoom.
https://theias.zoom.us/j/84116605050?pwd=VHV6VkRUM3hkM2dFSlo2QWJiUWtPdz09

Abstract: The CνB is a cosmological relic analogous to the CMB, and contains information about the universe before it...