title: ÐÐ»Ð¸ÑÐ½Ð¸Ðµ Ð°ÐºÑÐ¸Ð¾Ð½Ð½Ð¾Ð³Ð¾ Ð¿ÐµÑÐµÑ Ð¾Ð´Ð° Ð½Ð° ÑÐµÑÐ¼Ð¾Ð´Ð¸Ð½Ð°Ð¼Ð¸ÐºÑ ÑÐ°Ð½Ð½ÐµÐ¹ ÐÑÐµÐ»ÐµÐ½Ð½Ð¾Ð¹
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: The influence of the axion transition on the thermodynamics of the early Universe
Creators: name: ÐÐ¸Ð½Ð¸Ð¼ÑÐ»Ð»Ð¸Ð½, ÐÑÑÑÑ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2020
Subjects: Ð°ÐºÑÐ¸Ð¾Ð½Ñ
ÑÐºÐ¾ÑÐ¾ÑÑÑ ÑÐµÑÐ¼Ð°Ð»Ð¸Ð·Ð°ÑÐ¸Ð¸
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ÑÐ¿Ð¾Ñ Ð° Ð¿ÐµÑÐ²Ð¸ÑÐ½Ð¾Ð³Ð¾ Ð½ÑÐºÐ»ÐµÐ¾ÑÐ¸Ð½ÑÐµÐ·Ð°
axions
thermalization speed
constant hubbla
scale factor
Bose Einstein condensate
era of primary nucleosynthesis

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description: The theme of the final qualification work: "The influence of the axion transition on the thermodynamics of the early Universe."
This work is devoted to the study of the thermalization of axions and photons. Tasks that were solved during the research:
 Numerical calculation of plasma entropy in the Universe from a photon temperature of 2.725 K to a temperature of ã10ã^16 K.
 Measurement of energy density in the universe.
 The time dependence of temperature on the Universe was calculated.
 The numerical value of the dependence of the scale factor on temperature.
 The dependence of the Bose-Einstein condensate formation temperature on the axion decay constant is calculated.
 The ratio of thermalization rates corresponding to different decay constants is found.
 A numerical calculation was made of the rate of thermalization of axions, photons, and the Hubble constant.
Python In the course of the work, processes such as neutrinos, annihilation, and confinement, which influenced the thermodynamic values, were studied.
As a result of the work, it was found that at certain decay constants, the thermalization process can occur in the era of nucleosynthesis.