Shear viscosity to entropy density ratio: A powerful tool for gravity theories and strongly coupled fluids
Fuente:
arXiv
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866912575815417856 |
|---|---|
| author | Chiofalo, Marilù Grasso, Dario Liberati, Stefano Mannarelli, Massimo |
| author_facet | Chiofalo, Marilù Grasso, Dario Liberati, Stefano Mannarelli, Massimo |
| contents | In this perspective review, we present a concise yet multifaceted overview of the pivotal role played by the the shear viscosity to entropy density ratio across various physical contexts. After summarizing some of the main aspects of the bound obtained by Kovtun, Son and Starinets, we examine potential sources of its violation, exploring the insights these may offer and their connections to fundamental causality conditions. We also review a range of experimental tests conducted in diverse, yet complementary, physical systems, discussing the prospects opened by upcoming measurements. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_06178 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Shear viscosity to entropy density ratio: A powerful tool for gravity theories and strongly coupled fluids Chiofalo, Marilù Grasso, Dario Liberati, Stefano Mannarelli, Massimo General Relativity and Quantum Cosmology Quantum Gases High Energy Physics - Theory In this perspective review, we present a concise yet multifaceted overview of the pivotal role played by the the shear viscosity to entropy density ratio across various physical contexts. After summarizing some of the main aspects of the bound obtained by Kovtun, Son and Starinets, we examine potential sources of its violation, exploring the insights these may offer and their connections to fundamental causality conditions. We also review a range of experimental tests conducted in diverse, yet complementary, physical systems, discussing the prospects opened by upcoming measurements. |
| title | Shear viscosity to entropy density ratio: A powerful tool for gravity theories and strongly coupled fluids |
| topic | General Relativity and Quantum Cosmology Quantum Gases High Energy Physics - Theory |
| url | https://arxiv.org/abs/2509.06178 |