Cosmological Frequency Combs

TL;DR

This paper introduces Cosmological Frequency Combs, a new class of solutions in scalar field cosmology that produce phase-locked oscillations affecting cosmic observables and potentially resolving the H0 tension.

Contribution

It identifies and characterizes a novel class of time periodic attractor solutions in scalar field cosmology, linking frequency combs to cosmic acceleration.

Findings

CFC solutions induce observable modulations in Hubble parameter and growth rate

They provide a dynamical mechanism to address the H0 tension

Uncover a new phase of cosmic acceleration

Abstract

We identify a new class of time periodic attractor solutions in scalar field cosmology, which we term Cosmological Frequency Combs (CFC). These solutions arise in exponential quintessence models with a phantom matter background and exhibit coherent phase-locked oscillations in the scalar field's normalized variables. We demonstrate that such dynamics induce modulations in observables like the Hubble parameter and growth rate, offering a dynamical mechanism to even address the H0 tension exactly. Our results uncover a previously unexplored phase of cosmic acceleration, linking the concept of frequency combs to large scale cosmological evolution.