Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Higher derivative effects on eta/s at finite chemical potential   We examine the effects of higher derivative corrections on eta/s, the ratio
of shear viscosity to entropy density, in the case of a finite R-charge
chemical potential. In particular, we work in the framework of five-dimensional
N =2 gauged supergravity, and include terms up to four derivatives,
representing the supersymmetric completion of the Chern-Simons term A \wedge Tr
(R \wedge R). The addition of the four-derivative terms yields a correction
which is a 1/N effect, and in general gives rise to a violation of the eta/s
bound. Furthermore, we find that, once the bound is violated, turning on the
chemical potential only leads to an even larger violation of the bound.

12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ