Quantum Corrections to $η/s$ from JT Gravity
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2025
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866917311125913600 |
|---|---|
| author | Cremonini, Sera Li, Li Liu, Xiao-Long Nian, Jun |
| author_facet | Cremonini, Sera Li, Li Liu, Xiao-Long Nian, Jun |
| contents | We revisit the computation of the shear viscosity to entropy ratio $η/s$ at finite chemical potential in a holographic model that takes into account the quantum fluctuations in the IR region of near-extremal black branes. Such quantum corrections can be computed from JT gravity and generate non-trivial temperature dependence for $η/s$, which deviates from the universal $1/4π$ result. In the semi-classical regime, $η/s$ attains a minimum which is below the KSS bound, generated by the presence of the quantum effects. In the quantum regime at lower temperatures, $η/s$ increases and is well above the KSS bound. We also compare the shear viscosity to the quantum-corrected absorption cross-section of near-extremal black holes, and find agreement. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_21602 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Quantum Corrections to $η/s$ from JT Gravity Cremonini, Sera Li, Li Liu, Xiao-Long Nian, Jun High Energy Physics - Theory General Relativity and Quantum Cosmology We revisit the computation of the shear viscosity to entropy ratio $η/s$ at finite chemical potential in a holographic model that takes into account the quantum fluctuations in the IR region of near-extremal black branes. Such quantum corrections can be computed from JT gravity and generate non-trivial temperature dependence for $η/s$, which deviates from the universal $1/4π$ result. In the semi-classical regime, $η/s$ attains a minimum which is below the KSS bound, generated by the presence of the quantum effects. In the quantum regime at lower temperatures, $η/s$ increases and is well above the KSS bound. We also compare the shear viscosity to the quantum-corrected absorption cross-section of near-extremal black holes, and find agreement. |
| title | Quantum Corrections to $η/s$ from JT Gravity |
| topic | High Energy Physics - Theory General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2510.21602 |