Beyond eta/s = 1/4pi

Beyond eta/s = 1/4pi
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DOI:
10.1088/1126-6708/2009/03/084
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发表时间:
2008-12
期刊:
arXiv: High Energy Physics - Theory
影响因子:
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通讯作者:
A. Buchel;R. Myers;Aninda Sinha
A. Buchel;R. Myers;Aninda Sinha
中科院分区:
其他
文献类型:
--
作者:
A. Buchel;R. Myers;Aninda Sinha

文献摘要

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利用规范理论/弦理论对偶性的低能有效描述,证明了在中心电荷不相等的超共形规范理论中,Kovtun-Son-Starinets粘性边界一般是违反的。我们给出了新的例子(弦理论结构和规范理论),其中在可控的环境中违反了界限。在此讨论的背景下,我们考虑了ADS/CFT计算结果与QCD等离子体的比较。
We use low-energy effective description of gauge theory/string theory duality to argue that the Kovtun-Son-Starinets viscosity bound is generically violated in superconformal gauge theories with non-equal central charges $c\ne a$. We present new examples (of string theory constructions and of gauge theories) where the bound is violated in a controllable setting. We consider the comparison of results from AdS/CFT calculations to the QCD plasma in the context of this discussion.