η/s at finite coupling
Abstract
We compute the ratio of the coefficient of shear viscosity to entropy density at finite coupling and at zero chemical potential using holographic duality, up to ten derivative terms in the low energy effective five-dimensional action, of a specific kind, which may or may not be connected to the supersymmetric completion of type IIB theory. The result suggests that this ratio can be positive only for the 8th derivative term even with the form of that term in the action as CijklCklmnCmnrsCrsij, where C is the Weyl tensor.
- Publication:
-
Physical Review D
- Pub Date:
- February 2010
- DOI:
- 10.1103/PhysRevD.81.045005
- arXiv:
- arXiv:0910.0101
- Bibcode:
- 2010PhRvD..81d5005P
- Keywords:
-
- 11.25.Tq;
- 11.25.Wx;
- 11.25.-w;
- 11.25.Sq;
- Gauge/string duality;
- String and brane phenomenology;
- Strings and branes;
- Nonperturbative techniques;
- string field theory;
- High Energy Physics - Theory;
- General Relativity and Quantum Cosmology;
- High Energy Physics - Phenomenology;
- Nuclear Theory
- E-Print:
- 1+16 pages, Latex