Dmitry Podolsky has got his PhD from Landau Institute for Theoretical Physics. He currently works as postdoc at Case Western Reserve University. He is also one of the editors of NEQNET.

121. On interaction between coherent condensate and turbulent flow in two dimensions

It looks like I did not review new nice papers in ArXiv for so long time While I have no idea what is the reason for this particular fact, I tell you that the ultimate reason for similar facts was always my tremendous  laziness. What could a man do with such an evil? The only [...]

120. Talk in Munich. Regularizing inflaton correlation functions

Let me get again back from confinement to eternal inflation , or more precisely, to the infrared behavior of correlation functions of a self-interacting massless scalar field on de Sitter background. In what follows, I will consider the case (a QFT in fixed dS spacetime). As I have explained in the post about leading logs, naive perturbation theory (expanding [...]

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. Since we, scientists, are all lazy (as you are!), that’s what I would like to do: I will give three different solutions of  the exercise with three different answers Then, if you are interested to learn the subject (and you [...]

118. Last two weeks of November on NEQNET

Well, those two weeks were quite productive ones! – 19 posts in overall (or 20 including this one ) This counts to 1.5 posts per day (and you should take into account that I was on leave to Munich for 4 days). I hope my writing was not too boring for you Physics * Eternal [...]

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). It [...]

116. Hawking at PI

So, all these rumors actually had something to do with reality… and those smart ons who thought that the appointment of Neil Turok as the Director of PI should at some point lead to Hawking’s relocation to Canada, were actually right. I just recieved the following email: Professor Stephen Hawking to Regularly Visit Canada’s Perimeter [...]

115. Talk in Munich. Leading logs

Last time I have claimed that the leading IR divergences in the loop expansion for the inflaton pair correlation function in theory contribute in the form of expansion , (1) where (3) If you want to see a more accurate derivation, then I can recommend to take a look at the famous book by Andrei Linde. [...]

114. But Korean inventors are sometimes ahead of Japanese…

as Lubos Motl indicates in comments to the previous post Indeed so, the creativity of Sumsing engineers is overwhelming! Enjoy.

113. Japanese inventors are always ahead

Some 30-40 years ago there was a movement among Russian inventors amazingly popular at that time (not so popular nowadays) – for example, a couple of research institutes was entirely devoted to its development. The movement was related to the theory of solving inventor’s problems (TRIZ) first introduced by G. Altshuller and highly publicised – [...]

112. Talk in Munich. Other two interesting infrared scales

As Instanton figured out in comments to the previous post, the scale is related to the self-reproduction scale. How to show this? Well, recall that the classical displacement of the inflaton field during one efolding is , (1) where is the slow roll parameter. On the other hand, during the same amount of time the [...]