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Recent posts
Workshop on tests of gravity at Case Western – day 1
Dear friends, I am sorry for being rather quiet for a while. As many of you may already know, my laptop has decided to enter coma during the trip, as a result, I was left without appropriate internet access (sporadic use of Pascal Vaudrevange’s computer is not counted, thanks, Pascal!). Although the laptop tried to [...]
Things that go bump in the CMB polarization
This post is written by Michael Mortonson, graduate student of Wayne Hu at the U. of Chicago. Michael has also asked me to thank Cora Dvorkin and Wayne Hu (U. of Chicago), and Hiranya Peiris (U. of Cambridge), who contributed to the post. Dmitry. One of the most impressive results from experiments that have measured [...]
Real-time gauge/gravity duality
Balt van Rees from the U. of Amsterdam continues the discussion of non-equilibrium AdS/CFT we have started not so long time ago. Since his recent paper with Skenderis was one of the major achievements in the field, I highly recommend going through his post. Dmitry. Our recent paper Real-time gauge/gravity duality offers a prescription for [...]
Correlator of Wilson and t’Hooft loops at strong coupling in N=4 SYM theory
Andrew Zayakin works at LMU, Munich and ITEP, Moscow. His interests include non-perturbative physics of QCD, string theory and AdS/CFT correspondence. Dmitry. This post is about my recent paper with Alexander Gorsky and Alexander Monin about a correlator of a Wilson and a ‘t Hooft loop. Before I proceed, I should explain what these objects [...]
String theory and the diffusion equation
Gianluca Calcagni is a postdoc at Penn State working in the group of Martin Bojowald. His interests include string theory, string field theory and cosmology. Dmitry. This post is based on arXiv:0904.3744, in collaboration with Giuseppe Nardelli. Check the links for references and introductory reviews on the subject. A question. The prototype of instanton in [...]
Vorticity generation in cosmological perturbation theory
Adam Christopherson is a PhD student at Queen Mary, U. of London working with Karim Malik on cosmological perturbation theory. Dmitry. In this blog post, I will summarize recent work on vorticity generation in cosmological perturbation theory, undertaken by Karim Malik, David Matravers and myself. The main result of the paper this is based on, [...]
Correcting the initial vacuum state in quantum gravity
Emre Kahya is a postdoc at Koc University, Turkey (he is a former graduate student of Richard Woodard). Dmitry. Cosmology is becoming the most active area of research in theoretical physics for the last 10 years. We now understand that initial quantum fluctuations are reasons of our existence with in the context of Inflation. This [...]
One week to spend in US
At this very moment – when you are reading this – I am flying to US, where the final destination of my trip is Cleveland. The plan is to take part in the 3-day Workshop on tests of gravity and gravitational physics at Case Western Reserve U. The schedule there is very dense and workshop [...]
On gun politics and culture in US
In Russia, any talk about personal weapons/gun policy gets immediately reduced to the question of how actually effective are guns for personal self-defence on the street. On the other hand, in US general attractor seems to be discussion of the statement that personal weapons is your defence against tyranny, i.e., “armed man=free man” etc. etc. [...]
Average life expectancy or more on data visualization
In continuation of my series of posts about data visualization (Dynamical maps and Gapminder), let me show you today another cool resource: interactive map of the world StatPlanet. Here is for example a map showing average age in different countries (data from 2006): Russia seems to be rather mature country on this map – average [...]
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Large non-Gaussianity from axion inflation
January 31, 2012 14:01 -
On strong disorder renormalization
March 18, 2011 20:03 -
Relaunching NEQNET
January 20, 2011 21:01 -
Saturday’s photoguess: what does this monkey symbolize?
June 20, 2009 19:06 -
Dynamics of space storm
June 19, 2009 12:06
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Micro: Can 2 question provide a common solution? Black holes, information loss paradox and Ultra high energy cosmic rays. ...
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James Ph. Kotsybar: SAGITTARIUS A* -- James Ph. Kotsybar Mysteriously cloaked, obscure despite Interior illuminating glare, Long ...
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cad: The presentation can be found in several formats at http://pirsa.org/08110051/...
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Leo: Ok I have a question: if a black hole is supermassive, say 100 billion solar mass, let's suppose Alice fells int...
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superkuh: I am glad you are back! No more disapointing weekly refreshings of that monkey....
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Ariel Amir: Very interesting, thanks. It indeed seems to be very close to what we discuss here. I wonder whether the distributi...
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