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COND-MAT
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 [...]
Practical quantum cryptography
As it seems, people from Cambridge were able to overcome difficulties that make quantum cryptography impractical: they have built a network with quantum cryptography-based security that allows 10 Mbit/s broadband speed (although the distances between nodes cannot exceed 10 km) – previous speed record was something like 10kbit/s or so. Open key cryptography In order [...]
383. Puzzling kinetics of Bose-Enstein condensation
Just finished reading a really review “Magnon BEC and spin superfluidity” by Yu. Bunkov and G. Volovik, which left me with quite a bit of material to think about… Probably the thing that stroke me most after digesting the review is how poorly I (or in truth – it’s better to say “we”) actually understand [...]
381. M2 branes and Chern-Simons theories
John Davey is a PhD student of Amihay Hanany at Physics Department of Imperial College, London. Dmitry. Recently Chern-Simons theories have attracted much attention as they are thought to describe the world volume theory of the elusive M2 brane. In this short article I will attempt to outline some of the recent developments in this field [...]
377. Temporal and spatial dependence of quantum entanglement
In textbooks, quantum entanglement are often introduced to readers with the simplest case: in an isolated system with two parties or subsystems, if a quantum states can be factorized into a product of the quantum states for each subsystem, then it is called a separable state, otherwise it is entangled. For a separable state, the [...]
368. Inertial confinement: more on interaction of laser emission with matter
Yeah… so, where did we stop last time? I’ve just said another triviality – that laser emission strongly interacts with material of the fuel capsule. There are several mechanisms of this interaction: deflection (ablator and fuel are almost transparent but not quite), absorption and scattering. Wired Science visits LLNL and National Ignition Facility As for [...]
366. Some interesting recent papers in Arxiv
Just wanted to acknowledge their existence, although I’ll not be really able to review them due to the lack of time… 1. Quantum field theory 1.1. “Non-Abelian Duality and Confinement in N=2 Supersymmetric QCD” by Michail Shifman and Alesha Yung. The authors study transitions from weak to strong coupling in N = 2 SQCD that [...]
342. Thermal equilibrium in special relativity
David Cubero is professor at the Department of Applied Physics of the University of Sevilla. Dmitry. Special relativity, despite being more than a hundred years old, still shows an intriguing capacity to surprise us in very fundamental issues, such as thermal equililbrium. In this post, we will review a recent controversy about the proper velocity [...]
329. Human Activity in the Web
Filippo Radicchi is a research scientist in Complex Systems Lagrange Lab, ISI Foundation, Turin. He is interested in non-equilibrium diagrammatic methods, RG group analysis of complex networks and community detection. Dmitry. We use to spend a relevant part of our time surfing the Web: we read news, make posts in blogs, share photos and music, [...]
323. Fractional quantum Hall effect in some multicomponent systems
Zlatko Papic is a PhD student at LPS, Universite Paris-Sud, France (his advisors are Mark Goerbig and Nicolas Regnault) and SCL, Institute of Physics, Serbia (where his thesis advisor is Milica Milovanovic). His main interests include quantum Hall systems. Dmitry. In recent papers, we have investigated the origins of fractional quantum Hall states that occur [...]
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On moduli stabilisation in heterotic orbifolds
April 24, 2012 09:04 -
A holographic model of the quantum Hall effect
April 19, 2012 09:04 -
Transdimensional Multiverse Measures
April 18, 2012 11:04 -
Large non-Gaussianity from axion inflation
January 31, 2012 14:01 -
On strong disorder renormalization
March 18, 2011 20:03
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Momchil: I want to ask the experts about an apparent confusion, that appears in many papers on the Unruh effect. As you stat...
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Paul: Excellent list! how lucky you are to be involved in the effort to solve some of these. On time, I question its re...
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philbert: Simple illustration and may apply to mixed layer boundary layers, how about the stable and other types of boundary ...
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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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