The Cosmological Constant Problem: An Accessible Introduction

arXiv:2606.20778 · gr-qc, astro-ph.CO, hep-th · Submitted 2026-06-18 · Read on arXiv

Ali Kaya, Adam Lahey

gr-qc, astro-ph.CO, hep-th

Submitted: 2026-06-18

Comments: 22 pages, Revtex4-1, Accepted for publication in the American Journal of Physics

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Regularization — 31× in this paper · explained in 3 episodes
• Quantization — 7× in this paper · explained in 12 episodes
• Hilbert Space — 4× in this paper · explained in 2 episodes
• Consistency — 3× in this paper · explained in 3 episodes
• Accuracy — 1× in this paper · explained in 1 episode
• Adam — 1× in this paper · explained in 2 episodes
• Adiabatic Evolution — 1× in this paper · explained in 2 episodes
• Decoupling — 1× in this paper · explained in 2 episodes
• Generalization — 1× in this paper · explained in 13 episodes
• Homogeneity — 1× in this paper · explained in 2 episodes
• Quantum Physics — 1× in this paper · explained in 10 episodes
• Reheating — 1× in this paper · explained in 2 episodes
• Unified Framework — 1× in this paper · explained in 5 episodes

Sources

• The history of the cosmological constant problem
• Everything You Always Wanted To Know About The Cosmological Constant Problem (But Were Afraid To Ask)
• Lectures on the Cosmological Constant Problem
• On Loops in Inflation
• The Zeta-Zeta Correlator Is Time Dependent
• Stress-Energy Tensor of Adiabatic Vacuum in Friedmann-Robertson-Walker Spacetimes
• Amplitude of Perturbations from Inflation
• The Cosmological Constant Problems (Talk given at Dark Matter 2000, February, 2000)
• Fluctuations of Quantum Fields in a Classical Background and Reheating
• Background Independent Quantum Gravity: A Status Report
• Comment on Inflation and Alternative Cosmology
• Initial wave-function of the universe is arbitrary

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• Unitary quantum matter-bounce in a universe with a positive cosmological constant