| Issue |
EPL
Volume 154, Number 3, May 2026
|
|
|---|---|---|
| Article Number | 39001 | |
| Number of page(s) | 7 | |
| Section | Gravitation, cosmology and astrophysics | |
| DOI | https://doi.org/10.1209/0295-5075/ae55c4 | |
| Published online | 30 April 2026 | |
Cosmological frequency combs
1 Department of Physics and Astronomy, Vanderbilt University - Nashville, TN 37235, USA
2 Department of Physics, Sri Guru Tegh Bahadur Khalsa College, University of Delhi - New Delhi 110007, India
3 Department of Electrical and Electronics Engineering, Birla Institute of Technology and Science, Pilani-Dubai Campus, Dubai International Academic City - Dubai 345055, UAE
4 Department of Mechanical Engineering, Birla Institute of Technology and Science, Pilani-Pilani Campus, Vidya Vihar - Pilani 333031, India
Received: 23 October 2025
Accepted: 23 March 2026
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.
© 2026 The author(s)
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