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144. For lazy, yet curious students
Suppose you are a cosmologist – a postdoc or an assistant professor. A student just knocked your door – he has heard that cosmology (inflation, non-gaussianities, dark energy and dark matter) is a cool subject right now. He is also aware of the fact that you are famous (well, not too much, but that he [...]
143. The structure of correlation functions in single-field inflation
This is a guest post by Sarah Shandera from the University of Columbia. Dmitry. Dmitry has asked me to write a post about my recent paper, arXiv:0812.0818, about correlation functions in single field inflation. The motivation behind this work is the potential of very near-future data (from the Planck satellite and large scale structure surveys) [...]
142. Chaotic inflation on the landscape?
By a chance, do you remember the paper by Nemanja Kaloper and Lorenzo Sorbo that we have recently discussed? There, the authors were modeling quintessence by axion-like fields that dynamically mix with 4-form fields. The mixing introduced mass terms for the axions approximately preserving the shift symmetry. (By the way, I was surprised to see [...]
141. On information loss paradox, statistical and quantum mechanics
Recently, I got into the discussion of information loss paradox in spacetimes with timelike and spacelike horizons (that is, black holes, de Sitter and staff like them). Let me remind you what is the issue (see for example Susskind’s recent book for details). Suppose you prepare some quantum state descrbing a given physical object. This [...]
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. First of all, the number of subscribers to our RSS feed has crossed the [...]
139. Illuminated
Dmitry has been kind enough to offer me space here. I hope I can live up to being the bard of physics. I may include verse dealing with other sciences such as biology. I hope it continues to amuse all who happen here. James Ph. Kotsybar The physicists in their studies transcribe formulae that define [...]
138. Synthetic biology and iGem: part 2
This is the next (and probably the last – we will see ) part of my interview with Alexej Skvortsov, the leader of the Russian team in iGem 07, international competition in synthetic biology. D.: How did you check that your bacteria have the properties you wanted (in your case, that the reaction to the [...]
137. Synthetic biology and iGem: interview
This story is rather long one… Browsing the web approximately a year ago , I have found an interesting article on wired.com which did show that biology students are considered somewhat more important asset than physics students nowadays – in particular, they are getting taught more effectively and more money is invested in their education [...]
136. Google Books now include magazines
As many of you have noticed, Google have recently won the major lawsuit against publishers and authors. Here is the first consequence. Google has just announced that it is going to include all issues of such magazines as Popular Science Popular Mechanics Man’s Health Bulletin of the Atomic Scientists Maximum PC many others into the [...]
135. Steven Chu is the Secretary of Energy
Via Cosmic Variance: This is fantastic news. Steven Chu, director of the Lawrence Berkeley National Lab and 1997 Nobel Laureate in Physics for his work in laser cooling of atoms, has been nominated to be the next Secretary of Energy in the Obama administration. (Thanks to Elliot in comments.) This post is enormously important for [...]
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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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