Conveners
W1-5 Fields and Strings I (DTP) | Champs et cordes I (DPT)
- Cliff Burgess (McMaster U/Perimeter Inst.)
Dispersion relations, often called Kramers-Kronig relations, exploit analyticity to reconstruct the real part of a scattering amplitude from its imaginary (or absorptive part), which is often easier to measure and or to compute. I will present a generalization which reconstructs complete four-point correlators in any conformal field theory, starting with only very limited information about...
We consider the decay due to tunnelling of metastable Skyrmions that exist in the false vacuum. The possible mass term for the pions explicitly breaks the chiral symmetry. The only phenomenological constraint on the mass term is that the resultant pion mass be small. This allows for the possibility of local minima of the potential, which could give rise to metastable, so-called false vacuum...
The $AdS_4$ spacetime is of much interest to physicists, because of its relevance to the AdS/CFT duality. Very little is known
about how to extract quantum correlations from the AdS vacuum, a procedure called entanglement harvesting.
Using a new and general theorem, we calculate the entanglement harvested by a pair of Unruh-DeWitt detectors coupled to a conformal scalar vacuum of $AdS_4$, in...
The stability of asymptotically AdS$_{d+1}$ spacetime under arbitrarily small perturbations of a minimally coupled scalar field has been examined via dual lines of inquiry. The first, undertaken by Bizon and Rostworowski in 2011, was concerned with numerical solutions to the fully nonlinear system. This and subsequent work led to the determination that AdS was generically unstable to Gaussian...
The AdS/CFT correspondence provides an equivalence between a gravity theory in some bulk anti-deSitter spacetime and a conformal field theory (CFT) in one fewer dimensions on the boundary. A superconductor that can be described by a gravity theory through this correspondence is referred to as a 'holographic superconductor'. Gradient flow equations will evolve any given initial field...
In many cases the leaves and petals of plants form curved two-dimensional surfaces. The development of the curvature of those surfaces (ripples, warps, deformations, etc.) can be described by a time dependent Riemannian geometry. Since many biological and chemical systems evolve according to reaction-diffusion equations, the the geometrical description of growth naturally leads to curvature...
