Clebsch confinement and instantons in turbulence

Confinement from Instantons or Merons *

In contrast to ensembles of singular gauge instantons, which are well known to fail to produce confinement, it is shown that effective theories based on ensembles of merons or regular gauge instantons do produce confinement. Furthermore, when the scale is set by the string tension, the action density, topological susceptibility, and glueball masses are similar to those arising in lattice QCD.

Confinement, Turbulence and Diffraction Catastrophes

Many features of the large Nc transition that occurs in the spectral density of Wilson loops as a function of loop area (observed recently in numerical simulations of Yang-Mills theory by Narayanan and Neuberger) can be captured by a simple Burgers equation used to model turbulence. Spectral shock waves that precede this asymptotic limit exhibit universal scaling with Nc, with indices that can ...

Modelling Enhanced Confinement in Drift-Wave Turbulence

Characterization of local turbulence in magnetic confinement devices

A multifractal analysis based on evaluation and interpretation of large deviation spectra is applied to plasma edge turbulence data from different devices (MAST and Tore Supra). It is demonstrated that in spite of some universal features there are unique characteristics for each device as well as for different confinement regimes. In the second part of the exposition the issue of estimating the...

Building a “holographic dual” to QCD in the AdS5: instantons and confinement

Recent attempts to find a “holographic dual” to QCD-like theories included a suggestion by Karsh et al (below referred to as KKSS) to incorporate confinement via a potential quadratically increasing into the 5-th direction of the AdS5 space. We show that the same conclusion follows from completely different line of arguments. If instantons are promoted into the 5d space by identifying the insta...