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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 [...]
Quantum tunneling in flux compactifications
I am very happy to find myself writing a blog about a recent paper written by Jose Juan Blanco-Pillado, Alex Vilenkin and myself, and titled “Quantum tunneling in flux compactifications“. In this paper we studied bubble nucleation rates in a 6-dimensional Einstein-Maxwell theory. The two extra dimensions are compactified into a 2-sphere, and their radius [...]
A bound on the speed of sound from holography?
This post is authored by Aleksey Cherman (on the left) and Abhinav Nellore (on the right). Aleksey is a graduate student in the nuclear theory group at the University of Maryland, College Park, working with Tom Cohen, and Abhi is a graduate student in Steve Gubser’s group at Princeton. Dmitry. We all know that sound [...]
The in-in formalism and cosmological perturbations
This post is written by two great guys Peter Adshead (his photo is on the left) and Eugene Lim (on the right). Peter is a PhD student of Richard Easther at Yale U., while Eugene is Richard’s former postdoc now working at Columbia U. Dmitry. The discovery of the anisotropies in the cosmic microwave background [...]
Fermionic Schwinger-Keldysh propagators from AdS/CFT
Gregory Giecold is a PhD student at CEA, Saclay. Dmitry. In this post I will describe recent work on fermionic Schwinger-Keldysh propagators from AdS/CFT. For further details and references see ArXiv: 0904.4869. A formulation of the AdS/CFT correspondence relates correlators of a quantum field theory at strong coupling to the boundary behaviour of bulk classical [...]
Nanotechnology in space
Sorry, cannot help sharing it with you (bold below is mine): Pyongyang, May 7 (KCNA) — A spokesman for the Korean Committee of Space Technology issued a statement on Thursday, one month after satellite Kwangmyongsong-2 started its normal operation after being put into orbit. It says: As already reported, scientists and technicians of the DPRK [...]
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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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