## Title: *Inflation with R(αβ) terms in the Palatini formulation*
## Reporter: Yu-Shi Hao
| 12.30 | 10.00 AM | 6420 | Wang-Wei Yu |
## Title: *New results from SH0ES*
## Reporter: Wang-Wei Yu
## Abstract
In this paper, the authors talk about the inflation in f(R) gravity witn high order R(αβ),and give the spectrum and tensor-to-scalar ratio with cubic action.
I will introduce the new results from SH0ES and the data analysis about SH0ES.
## References
-[arxiv:2106.12422](https://arxiv.org/abs/2106.12422)*Inflation with R(αβ) terms in the Palatini formulation* by *Jaakko Annala* and *Syksy Rasanen*
-[arXiv:2112.04510](https://arxiv.org/abs/2112.04510)*A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km/s/Mpc Uncertainty from the Hubble Space Telescope and the SH0ES Team* by *Adam G. Riess*.
Despite the viscosity of a fluid ranges over several order of magnitudes and is extremely sensitive to microscopic structure and molecular interactions, it has been conjectured that its minimum displays a universal value which is experimentally approached in strongly coupled fluids such as the quark-gluon plasma. Recent early-time analysis suggests that hydrodynamics could serve as a universal attractor even when the deformation gradients are large and that dissipative transport coefficients, such as viscosity, could still display a universal behavior far-from-equilibrium. Motivated by these observations, we consider the real-time dissipative dynamics of two different bottom-up conformal holographic models under large shear deformations. We compute the viscosity-to-entropy density ratio in several states driven away from equilibrium by large time dependent shear rates. In all the cases considered, we observe that, in the late-time far-from-equilibrium state, both the viscosity-entropy ratio and the dimensionless ratio between energy density and entropy density approach a universal value which is completely independent of the initial conditions, the form of the driving and the parameters of the system. Moreover, the late-time universal value coincides with the expectation from hydrodynamics naively valid only near equilibrium.
## References
<!-- - [Arxiv:2110.14718](https://arxiv.org/abs/2110.14718) *Cosmic inflation from broken conformal symmetry* by *Rong-Gen Cai, Yu-Shi Hao* and *Shao-Jiang Wang*. -->