One-loop Corrected Holographic Shear Viscosity to Entropy Density Ratio at Low Temperatures
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866912657038114816 |
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| author | Zayas, Leopoldo A. Pando Zhang, Jingchao |
| author_facet | Zayas, Leopoldo A. Pando Zhang, Jingchao |
| contents | Near-extremal black holes are known to contain strong quantum fluctuations in their near-horizon near-AdS$_2$ throat region governed by an effective action that includes Schwarzian modes. These fluctuations lead to one-loop corrections in the gravitational path integral that are essential in understanding the thermodynamics of near-extremal black holes at low temperatures where they become more dominant that the semi-classical answer. We explore the implications of these quantum fluctuations for near-extremal asymptotically AdS$_4$ black branes in the context of the AdS/CFT correspondence. We note that at one-loop level there is a coupling of the shear gravitational fluctuations to one of the would-be zero modes. This coupling affects the retarded Green's function in a way that leads to a low temperature violation of the shear viscosity to entropy density bound. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2510_16100 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | One-loop Corrected Holographic Shear Viscosity to Entropy Density Ratio at Low Temperatures Zayas, Leopoldo A. Pando Zhang, Jingchao High Energy Physics - Theory Strongly Correlated Electrons General Relativity and Quantum Cosmology Near-extremal black holes are known to contain strong quantum fluctuations in their near-horizon near-AdS$_2$ throat region governed by an effective action that includes Schwarzian modes. These fluctuations lead to one-loop corrections in the gravitational path integral that are essential in understanding the thermodynamics of near-extremal black holes at low temperatures where they become more dominant that the semi-classical answer. We explore the implications of these quantum fluctuations for near-extremal asymptotically AdS$_4$ black branes in the context of the AdS/CFT correspondence. We note that at one-loop level there is a coupling of the shear gravitational fluctuations to one of the would-be zero modes. This coupling affects the retarded Green's function in a way that leads to a low temperature violation of the shear viscosity to entropy density bound. |
| title | One-loop Corrected Holographic Shear Viscosity to Entropy Density Ratio at Low Temperatures |
| topic | High Energy Physics - Theory Strongly Correlated Electrons General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2510.16100 |