Viscosity Bound and Causality Violation
| dc.creator | Brigante, Mauro | |
| dc.creator | Liu, Hong | |
| dc.creator | Myers, Robert C. | |
| dc.creator | Shenker, Stephen | |
| dc.creator | Yaida, Sho | |
| dc.date | 2008-02-22 | |
| dc.date | 2008-05-22 | |
| dc.date.accessioned | 2026-07-07T11:56:16Z | |
| dc.date.available | 2026-07-07T11:56:16Z | |
| dc.description | In recent work we showed that, for a class of conformal field theories (CFT) with Gauss-Bonnet gravity dual, the shear viscosity to entropy density ratio, $η/s$, could violate the conjectured Kovtun-Starinets-Son viscosity bound, $η/s\geq1/4π$. In this paper we argue, in the context of the same model, that tuning $η/s$ below $(16/25)(1/4π)$ induces microcausality violation in the CFT, rendering the theory inconsistent. This is a concrete example in which inconsistency of a theory and a lower bound on viscosity are correlated, supporting the idea of a possible universal lower bound on $η/s$ for all consistent theories. | |
| dc.description | 5 pages, 2 figures; v2: a slight change in the title and minor revisions made, references updated | |
| dc.identifier | https://arxiv.org/abs/0802.3318 | |
| dc.identifier | http://arxiv.org/abs/0802.3318 | |
| dc.identifier | Phys.Rev.Lett.100:191601,2008 | |
| dc.identifier | doi:10.1103/PhysRevLett.100.191601 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/205527 | |
| dc.subject | High Energy Physics - Theory | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Viscosity Bound and Causality Violation | |
| dc.type | text |