期刊
EUROPEAN PHYSICAL JOURNAL C
卷 80, 期 8, 页码 -出版社
SPRINGER
DOI: 10.1140/epjc/s10052-020-8288-9
关键词
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资金
- NSFC [11875184]
- Mid-career Researcher Program through the National Research Foundation of Korea [NRF-2016R1A2B3007687]
- National Research Foundation of Korea [2016R1A2B3007687] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
We study charged black hole solutions in 4-dimensional (4D) Einstein-Gauss-Bonnet-Maxwell theory to the linearized perturbation level. We first compute the shear viscosity to entropy density ratio. We then demonstrate how bulk causal structure analysis imposes an upper bound on the Gauss-Bonnet coupling constant in the AdS space. Causality constrains the value of Gauss-Bonnet coupling constant alpha(GB) to be bounded by alpha(GB) <= 0 as D -> 4.
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