One-loop corrections to eta/s in AdS(4)/CFT3

Autor(es)

Kuntz, Ibere ^{[1, 2, 3]} ; da Rocha, Roldao ^[2]

Afiliação do(s) autor(es)

^[1] Univ Bologna, Dipartimento Fis & Astron, Via Irnerio 46, I-40126 Bologna - Italy

^[2] Fed Univ ABC, Ctr Math, BR-09210580 Santo Andre, SP - Brazil

^[3] INFN, Sez Bologna, IS FLAG, Via B Pichat 6-2, I-40127 Bologna - Italy

• Tipo de documento: Artigo Científico
• Fonte: Nuclear Physics B; v. 961, DEC 2020.
• Citações Web of Science: 0

Resumo

We study quantum corrections at one-loop order to the shear viscosity to entropy ratio by implementing the Vilkovisky-Barvinsky effective action in asymptotically Anti-de Sitter spacetimes. The shear viscosity is shown to receive no corrections at this order, but the entropy acquires a logarithmic correction. The coefficient of this logarithm turns out to depend on the spin of the particles running in the loop and it can be either positive or negative. On the basis of this result, we argue that the Kovtun-Son-Starinets bound cannot be seen as a fundamental property of nature beyond the classical regime. (C) 2020 The Author(s). Published by Elsevier B.V. (AU)

• Processo FAPESP: 17/18897-8 - Correspondência fluido/gravidade, setores fermiônicos e suas ramificações
• Beneficiário: Roldão da Rocha
• Modalidade de apoio: Auxílio à Pesquisa - Regular