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COND-MAT
On strong disorder renormalization
Last time I talked about the fate of Anderson localization when the disorder fluctuates in time. This time I will talk about another localization problem, of a particular class of random matrices. The mathematical model I will describe in the following can be used to describe various physical problems: the localization of phonons in a [...]
Other interesting things in ArXiv (12 Jun 2009)
Wayne Hu. Acceleration from modified gravity: lessons from worked examples. The main question Wayne Hu discusses in this minireview is “How can we distinguish dark energy from modified gravity theories if the former and the latter provide the same predictions for cosmological dynamics?” He is particularly focused on DGP and models. His answer is the [...]
Other interesting things in ArXiv (11 Jun 2009)
Basically, there were so many interesting and useful papers (or at least they were useful for me) – lecture notes, reviews – that it will give me hard time posting reviews of all of them here – since I am lazy, I’ll just try to list some of them. Umut Gursoy et al. “Thermal Transport [...]
This and that in ArXiv on Monday
Due to unbelievable overload of the last days let me simply list the recent papers in ArXiv that I found the most interesting: 1. Quantum information T. Tilma el al., “Is entanglement a critical resource for quantum metrology?” Can we beat the shot-noise limit (and get to the Heisenberg limit) in quantum metrology by playing [...]
Biocentrism: book review
I was asked to review the book by Dr. Robert Lanza called “Biocentrism: how life and consciousness are the keys to understand true nature of the Universe“. If you are a scientist good enough in your area of expertise, at some point you start wondering whether you can explain everything around you, every single event, [...]
How might one design a nano-machine?
Significant advances in laboratory techniques in tailoring and processing materials at the atomic level have resulted in nanotechnology becoming an increasingly mature field. One of the exciting goals of nanotechnology is the design of powerful nano-machines, i.e. functional entities at the nano-scale that work like macro-world machines. A simple nano-machine would be an entity that [...]
Workshop on tests of gravity in Case Western – day 2 and Arkani-Hamed’s talk
The second day of the Workshop on Tests of Gravity (and here is my blog post about the first day) was mostly devoted to analog models (Bill Unruh, Michael Uhlmann, George Pickett) and models of modified gravity (Nima Arkani-Hamed, Justin Khoury, Stacy McGaugh, Ted Jacobson, Levon Pogosyan and Mark Wyman). Regarding analog models I don’t [...]
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 [...]
On Moore-Read states
I always find quite exciting when fundamental (and sometime abstract) results of pure mathematics and quantum field theory can be directly related to condensed matter or statistical mechanics problems with a clear physical interpretation and motivation. For instance, in our recent paper on “Clustering properties, Jack polynomials and unitary conformal field theories” (arXiv:0904.3702), we study [...]
More on IR divergences and decoherence in inflationary universe
I happened recently to dig through a couple of interesting papers by Yuko Urakawa and Takahiro Tanaka about IR divergences that cosmological perturbation theory in quasi-dS space features, namely “No influence on observation from IR divergence during inflation — Single field inflation –” and “Influence on observation from IR divergence during inflation — Multi field [...]
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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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