Quark confinement
163. What is AdS/QCD?
This is a a guest post by Josh Erlich from the College of William and Mary, Williamsburg. Dmitry. (…)
155. Witten explains how to quantize gauge theory
Long time (almost 6 months?) ago Peter Woit wrote about Yau Birthday Conference and briefly mentioned the talk Edward Witten gave there. (…)
140. First two weeks of December at NEQNET
Dear friends
Before I proceed to the (becoming usual already) list of posts published at NEQNET during the last two weeks, let me say a couple of words about the blog itself, which is currently the source of my pride
1. (…)
128. Melancholy
Jim Kotsybar has just sent me his another poem, which I liked very much (as usual) and would want to share it with you. (…)
126. From quarks to strings. Migdal-Makeenko equation and AdS-CFT correspondence
Although Lubos wants to see my answer to the poll ;-), I decided to finish my analysis of the recent Polyakov’s paper today.
Page 6. (…)
125. From quarks to strings. On Liouville mode, instantons and confinement in abelian theories
Alexander Polyakov have released this week a preprint about history of string theory, which is also so full of non-trivial physical ideas that I decided to list some of them in this post as well as to include my comments (or rather my ramblings :-))
So, here we go. (…)
122. Where are quarks in the Wilson loop?
An anonymous reader from Spain asks in comments to my “Wilson loop - physical introduction” post:
Why do you interpret a mathematical expresion that displays a gluon field (Amu) as a qqbar loop? (…)
119. Fun with energy gap for QCD Born-Oppenheimer Hamiltonian
Let us try to solve the Exercise 2 in this post about the Wilson loop. (…)
118. Last two weeks of November on NEQNET
Well, those two weeks were quite productive ones! (…)
117. Recent lattice QCD simulations - how good is QCD in the infrared?
A very interesting paper on lattice QCD spectroscopy by the European collaboration (DESY, Marceille, Wuppertal, Julich) is published in the recent issue of Science.The authors were able to reproduce the mass scales of light hadrons which coincide with measured ones up to 1% precision (take a look at the Table 1 in the paper). (…)
108. How stringy is QCD string?
I am in Munich now, so please forgive me for being a bit quiet
As I’ve explained in this small introduction into criteria of confinement, breaking of the chromoelectric tube (string) connecting heavy quark and antiquark happens through the production of a pair of light quark and antiquark in the strong chromoelectric field. (…)
106. Criteria for confinement. Wilson loop - getting more technical
Last time we have discussed a bit the behavior of the Wilson loop expected in the confinement and deconfinement phases and have concluded from simple physical considerations that the first one corresponds to the area law, while the second - to the perimeter law. (…)
103. Criteria of confinement. Wilson loop - physical discussion
It is often said that the most physically relevant criterion of confinement is the behaviour of the potential between two fermions: confinement implies the linear growth of potential between two charges with distance. (…)
101. Confinement. Extremely naive introduction
So, as I have promised last time, I am starting to collect my thoughts on the problem of quark confinement here. (…)
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