Cosmology

  1. Frontiers and Open Questions
    1. Dark Sector Physics
      1. Dark Matter Nature
        1. Beyond WIMP Paradigm
          1. Self-Interacting Dark Matter
            1. Fuzzy Dark Matter
              1. Primordial Black Holes
              2. Dark Energy Mysteries
                1. Coincidence Problem
                  1. Phantom Crossing
                    1. Interacting Dark Energy
                    2. Modified Gravity Alternatives
                      1. Extra-Dimensional Theories
                        1. Emergent Gravity
                          1. Entropic Gravity
                        2. Cosmic Inflation
                          1. Inflationary Models
                            1. Single-Field Inflation
                              1. Multi-Field Inflation
                                1. Non-Canonical Kinetic Terms
                                2. Observational Tests
                                  1. Primordial Gravitational Waves
                                    1. Non-Gaussianity Measurements
                                      1. Spectral Index Running
                                      2. Alternatives to Inflation
                                        1. Ekpyrotic Scenarios
                                          1. Cyclic Models
                                            1. Emergent Universe Models
                                          2. Quantum Cosmology
                                            1. Quantum Gravity Approaches
                                              1. String Theory Cosmology
                                                1. Loop Quantum Cosmology
                                                  1. Causal Set Theory
                                                  2. Initial Conditions Problem
                                                    1. Wave Function of Universe
                                                      1. No-Boundary Proposal
                                                        1. Tunneling from Nothing
                                                        2. Black Hole Cosmology
                                                          1. Black Hole Information Paradox
                                                            1. Holographic Principle
                                                              1. AdS/CFT Correspondence
                                                            2. Ultimate Fate of Universe
                                                              1. Accelerated Expansion Scenarios
                                                                1. Big Freeze
                                                                  1. Heat Death
                                                                    1. Big Rip
                                                                    2. Cyclic Scenarios
                                                                      1. Big Crunch
                                                                        1. Bounce Models
                                                                          1. Eternal Cycles
                                                                          2. Vacuum Decay
                                                                            1. Metastable Vacuum
                                                                              1. False Vacuum Decay
                                                                                1. Bubble Nucleation
                                                                              2. Current Tensions and Anomalies
                                                                                1. Hubble Constant Tension
                                                                                  1. Local vs Early Universe
                                                                                    1. Systematic Uncertainties
                                                                                      1. New Physics Solutions
                                                                                      2. S8 Tension
                                                                                        1. Structure Growth Discrepancies
                                                                                          1. Weak Lensing vs CMB
                                                                                            1. Modified Gravity Solutions
                                                                                            2. Anomalous CMB Features
                                                                                              1. Large-Scale Anomalies
                                                                                                1. Cold Spot
                                                                                                  1. Hemispherical Asymmetry
                                                                                                2. Multiverse Concepts
                                                                                                  1. Eternal Inflation
                                                                                                    1. Bubble Universe Formation
                                                                                                      1. Landscape of Vacua
                                                                                                        1. Anthropic Selection
                                                                                                        2. Many-Worlds Interpretation
                                                                                                          1. Quantum Decoherence
                                                                                                            1. Branch Selection
                                                                                                            2. Observational Consequences
                                                                                                              1. Testable Predictions
                                                                                                                1. Anthropic Reasoning
                                                                                                                  1. Fine-Tuning Arguments

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                                                                                                              7. Observational Cosmology

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                                                                                                              1. Foundations of Modern Cosmology