Dark Energy Radiation

Abstract

We show that if dark energy evolves in time, its dynamical component could be dominated by a bath of dark radiation. Within current constraints this radiation could have up to $\sim 10^4$ times more energy density than the cosmic microwave background. We demonstrate particular models in which a rolling scalar field generates different forms of dark radiation such as hidden photons, milli-charged particles and even Standard Model neutrinos. We find the leading effect on the late-time cosmological expansion history depends on a single parameter beyond $\Lambda$CDM, namely the temperature of the dark radiation today. Cosmological observations of this modified expansion rate could provide a striking signature of this scenario. The dark radiation itself could even be directly detectable in laboratory experiments, suggesting a broader experimental program into the nature of dark energy.

arXiv comment12 pages, 1 Figure

References in corpus (35)

• Dark Matter Search Results from a One Tonne$\times$Year Exposure of XENON1T
• Cosmic Evolution in a Cyclic Universe
• The QCD axion, precisely
• Electroweak Baryon Number Non-Conservation in the Early Universe and in High Energy Collisions
• Naturally inflating on steep potentials through electromagnetic dissipation
• Axion Cosmology Revisited
• New limit on Lorentz and CPT-violating neutron spin interactions
• New Extraction of the Cosmic Birefringence from the Planck 2018 Polarization Data
• Effective dynamics of soft non-abelian gauge fields at finite temperature
• Dark Matter Direct Detection with Accelerometers
• The hot baryon violation rate is $O({\alpha }_W^5{T}^4)$
• A Radio for Hidden-Photon Dark Matter Detection
• Detection of Light Dark Matter With Optical Phonons in Polar Materials
• The Sphaleron Rate in SU(N) Gauge Theory
• Thermalization in Weakly Coupled Nonabelian Plasmas
• Spintessence! New Models for Dark Matter and Dark Energy
• Thermal Friction as a Solution to the Hubble Tension
• Minimal Warm Inflation
• Relaxation from particle production
• Strong Sphalerons and Electroweak Baryogenesis
• Resonant absorption of bosonic dark matter in molecules
• Motion of Chern-Simons Number at High Temperature Under a Chemical Potential
• Physical Properties of Four Dimensional Superstring Gravity Black Hole Solutions
• Source mass characterization in the ARIADNE axion experiment
• Magnetic Bubble Chambers and Sub-GeV Dark Matter Direct Detection
• Storage Ring Probes of Dark Matter and Dark Energy
• Direct Detection of Spin-(In)dependent Nuclear Scattering of Sub-GeV Dark Matter Using Molecular Excitations
• Relaxation of the Cosmological Constant
• Relaxing the Cosmological Constant: a Proof of Concept
• Warm dark energy
• Evolution of the Primordial Axial Charge across Cosmic Times
• Born Again Universe
• Magnetic Field Transfer From A Hidden Sector
• Quantum Detection using Magnetic Avalanches in Single-Molecule Magnets
• Laboratory search for a quintessence field

Cited by in corpus (29)

• Quintessential interpretation of the evolving dark energy in light of DESI
• Quantifying Scalar Field Dynamics with DESI 2024 Y1 BAO measurements
• Gravitational wave background from non-Abelian reheating after axion-like inflation
• Observational Constraints on Warm Natural Inflation
• Implications of the Cosmic Birefringence Measurement for the Axion Dark Matter Search
• The role of the chiral anomaly in polarized deeply inelastic scattering II: Topological screening and transitions from emergent axion-like dynamics
• Warming up cold inflation
• WarmSPy: a numerical study of cosmological perturbations in warm inflation
• Thermal Friction as a Solution to the Hubble and Large-Scale Structure Tensions
• Rapidly Descending Dark Energy and the End of Cosmic Expansion
• Kick it like DESI: PNGB quintessence with a dynamically generated initial velocity
• Warm Inflation with the Standard Model
• Neutrino Interactions in the Late Universe
• Axion dark matter from frictional misalignment
• Viability of warm inflation with standard model interactions
• WI2easy: warm inflation dynamics made easy
• Warm inflation with a heavy QCD axion
• Revisiting Isocurvature Bounds on the Minimal QCD Axion
• Constraints on the scalar-field potential in warm inflation
• Electroweak baryogenesis by axionlike dark matter
• Terrestrial Probes of Electromagnetically Interacting Dark Radiation
• Axion dark matter with thermal friction
• Thermal Perturbations from Cosmological Constant Relaxation
• Cosmological Constraints on Thermal Friction of Axion Dark Matter
• On Sphaleron Heating in the Presence of Fermions
• Probing Long-Range Forces Between Neutrinos with Cosmic Structures
• Warm multi natural inflation
• No Warm Inflation From a Vanilla Axion
• Dissipative Emergence of Inflation from Quasi-Cyclic Universe