Quantum field theory
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. (…)
99. Eternal inflation with many light scalar fields
I am going to briefly discuss one result from the recent paper by Peter Adshead, Richard Easther and Eugene Lim. (…)
97. Second week of November on NEQNET
Physics
* Quintessence on the string theory landscape? (…)
96. Quintessence with w less than -1
In another very interesting recent paper on quintessence the Italian Team (Creminelli, D’Amico, Norena, Vernizzi - and warmest regards from Helsinki if you read it, Filippo :-)) is trying to construct an reliable example of QFT that behaves like the quintessence with ?ghost-like? (…)
94. Quantum scale invariance on the lattice
Arguably, the most interesting paper in archives today is the one by M. Shaposhnikov and I. Tkachev. (…)
93. Second order hydrodynamic coefficients in some field theories (like QCD)
By definition, we call an IR mode of a quantum field theory hydrodynamical, if its relaxation time goes to infinity, while its wave length . (…)
89. First week of November on NEQNET
Below is the list of what I wrote on this blog during the first week of November… not bad actually, it looks like with Agata’s birth I have become more productive, not less… Surprising
In the mean time, the number of subsribers to this blog has hit the magic number 100 (and peaked at 108 :-)) Thanks for subscribing, new readers, you are very much welcome! (…)
88. Belavin and Zamolodchikov on 2D quantum gravity
Both people are among inventors of conformal field theory, string theory and the chapter of field theory that is called “integrable systems” nowadays, so naturally, one cannot help taking an hour of her time and learn what each of them has new to say. (…)
87. Leptophilic dark matter
Recall the tempest in the physics blogosphere during the last two weeks - I mean, the one due to the CDF anomaly? (…)
85. Hard thermal loops: what is it?
Suppose that you are a person studying non-equilibrium diagrammatic methods. (…)
81. Edward Witten’s talk on 3D gravity
Fascinating video of Edward Witten’s talk on 3D quantum gravity given at the Princeton Institute for Advanced Study.The picture that goes back to Deser, ‘t Hooft and Jackiw is the following. (…)
80. Watching worlds collide: bubbles, bubbles, bubbles
Getting tired of malicious attacks by anti-landscapists, Spencer Chang, Matt Kleban and Thomas Levi released a paper about one observable effect on string theory landscape. (…)
78. A talk on scalar QFT, exact renormalization group and RG fixed points
Oliver Rosten who, as I gather, now works in the U. of Sussex with Daniel Litim, recently gave a talk on exact renormalization group in Perimeter. (…)
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