中国物理B ›› 2023, Vol. 32 ›› Issue (11): 119801-119801.doi: 10.1088/1674-1056/acea6a
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Thermodynamics of warm axionic Abelian gauge inflation
Xi-Bin Li(李喜彬)1,2,† and Yan-Ling Wu(武燕玲)1,2
- 1 College of Physics and Electronic Information, Inner Mongolia Normal University, Hohhot 010022, China;
2 Inner Mongolia Key Laboratory for Physics and Chemistry of Functional Materials, Inner Mongolia Normal University, Hohhot 010022, China
Thermodynamics of warm axionic Abelian gauge inflation
Xi-Bin Li(李喜彬)1,2,† and Yan-Ling Wu(武燕玲)1,2
- 1 College of Physics and Electronic Information, Inner Mongolia Normal University, Hohhot 010022, China;
2 Inner Mongolia Key Laboratory for Physics and Chemistry of Functional Materials, Inner Mongolia Normal University, Hohhot 010022, China
摘要： Inflationary spectral index from the Langevin equation is calculated under the frame of warm inflationary scenario with inflaton interacting with U(1) gauge fields through the Chern-Simons coupling $\propto\phi F_{\mu\nu}\tilde{F}^{\mu\nu}/f$. Under the strong dissipative condition, the spectral index is calculated in terms of the ratio of Hubble parameter to temperature H/T. Then relation between H/T and other cosmic parameters is analytically expressed, based on which a spectral index related to the Chern-Simons coupling strength is further obtained. Numerical results show that cosmic temperature T closes to a constant during inflation and decreases after inflation without a reheating process. Meanwhile, the ratio H/T tends to a constant if the gauged coupling constant is less than a threshold. This phenomenon shows that cosmic temperature may be an important physical parameter with a special value and adiabatic approximation still holds. We obtain the estimate H/T≤0.3377 during inflation from Planck data and other constraint conditions.
中图分类号: (Cosmology)
- 98.80.-k