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Cosmology II - Thermal History of the Universe
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Mathematica
Appreciate, Doubt, and Seek Truth
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1 Introduction
1.1 Cosmic Microwave Background
1.2 Temperature and Mass
1.3 Exercise
1.4 Thermal Mixture
1.5 Going Back: Hotter and Hotter
1.6 Pair Production and Pair Annihilation
1.7 Case 1: T>>m
1.8 Case 2: T~m
1.9 Case 3: T<<m
1.10 Neutrinos, a Special Case
1.11 Species Today
1.12 Heavier Leptons: Muons and Taus
1.13 Matter: Baryons and Electrons
1.14 Quarks and Gluons
1.15 Neutrinos
1.16 Exercise: A Mathematica Warmup
1.17 Looking Back
2 Thermodynamics of the Universe
2.1 Energy of a Thermal Mixture
2.2 Chemical Potential
2.3 Exercise
2.4 Quantum States
2.5 Internal Degrees of Freedom
2.6 Density of States
2.7 Distribution Function
2.8 Remarks
2.9 Relativistic Approximation
2.10 Non-Relativistic Approximation
2.11 Number Density
2.12 Exercise
2.13 Exercise
2.14 Excess Particle Density
2.15 Exercise
2.16 Exercise
Thermodynamics of the Universe
Excess Particle Density
Teacher: Simerdeep Singh
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