Related Experiment Video
Updated: Jan 31, 2026

Perfusion and Inflation of the Mouse Lung for Tumor Histology
Published on: August 6, 2020
Hyperbolic Inflation
1Physics Department, Stanford University, Stanford, California 94305, USA.
Abstract:
A model of cosmological inflation is proposed in which field space is a hyperbolic plane. The inflaton never slow-rolls, and instead orbits the bottom of the potential, buoyed by a centrifugal force. Though initial velocities redshift away during inflation, in negatively curved spaces angular momentum naturally starts exponentially large and remains relevant throughout. Quantum fluctuations produce perturbations that are adiabatic and approximately scale invariant; strikingly, in a certain parameter regime the perturbations can grow double exponentially during horizon crossing.
Related Concept Videos
Hyperbolic and Inverse Hyperbolic Functions: Problem Solving
Hyperbolic Functions
Inverse Hyperbolic Functions and Their Derivatives
Gas Laws: Boyle's, Gay-Lussac, Charles', Avogadro's, and Ideal Gas Law
Breathing
Lung Capacity

