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Showing posts from February, 2010

My cover design for the book D-branes

I have designed a cover for the book D-branes by Prof. Clifford Johnson. Why I did it? Because I was feeling sad that such a great book has such an uninteresting cover.

interesting papers of arXiv on WED 17 FEB 2010, 17/02/10

Title: Casimir effect for parallel plates in de Sitter spacetime
Authors: E. Elizalde, A. A. Saharian, T. A. Vardanyan

The braneworld corresponds to a manifold with boundaries and all fields which propagate in the bulk will give Casimir-type contributions to the vacuum energy and, as a result, to the vacuum forces acting on the branes.

The Casimir effect provides in this context a natural mechanism for stabilizing the radion field in the Randall–Sundrum model, as required for a complete solution of the hierarchy problem.

The Casimir energy and corresponding Casimir forces for two parallel branes in AdS spacetime have been evaluated in

W. Goldberger and I. Rothstein, Phys. Lett. B 491, 339 (2000); S. Nojiri, S.D. Odintsov,
and S. Zerbini, Class. Quantum Grav. 17, 4855 (2000); A. Flachi and D.J. Toms, Nucl.
Phys. B 610, 144 (2001); J. Garriga, O. Pujol`as, and T. Tanaka, Nucl. Phys. B 605, 192
(2001); E. Elizalde, S. Nojiri, S.D. Odintsov, and S. Ogushi, Phys. Rev. D 67, 0635…


Broccoli is very good. I found a nice explanatory review of vitaminal values of Broccoli and some Broccoli recipes.

Conformal Stokes theorem

Both the conformal Stokes' theorem and the form of delta function δ(x) in complex space are given in page 119 of di Francesco (See equation 5.33 - 5.36).

δ(x) = 1/π ∂z' (1/z)

where z is the complex coordinate.

z = (x + i y) /2
z' (z bar) = (x - i y) /2

Srimad Bhagavad Gita : online resources

1. Audio sound of the sacred song: the bhagavad gita, in three languages

chapter wise

2. Audio Gita:
Select Entire Chapter or any verse:

chapter + individual verse . very helpful.

3. bhagavad gita in pictures


Complete breakdown of Srimad Bhagavad Gita verse by verse with explanations and Sanskrit audio pronounciation.