Revisiting QCD-induced little inflation with chiral density wave state and its implications on pulsar timing array gravitational-wave signals

arXiv:2603.29772 · hep-ph, astro-ph.CO, nucl-th · Submitted 2026-03-31 · Read on arXiv

hep-ph, astro-ph.CO, nucl-th

Submitted: 2026-03-31

Updated: 2026-08-26

Terminology

• Reheating — 15× in this paper · explained in 2 episodes
• Phase Transitions — 7× in this paper · explained in 2 episodes
• Symmetry Breaking — 5× in this paper · explained in 3 episodes
• Core — 3× in this paper · explained in 2 episodes
• Benchmark — 2× in this paper · explained in 2 episodes
• Domain Walls — 1× in this paper · explained in 2 episodes
• First-Order Transition — 1× in this paper · explained in 2 episodes
• Homogeneity — 1× in this paper · explained in 2 episodes
• Institute for Basic Science — 1× in this paper
• QCD Critical End Point — 1× in this paper
• pulsar timing arrays — 1× in this paper · explained in 2 episodes

Sources

• The NANOGrav 15-year Data Set: Evidence for a Gravitational-Wave Background
• The second data release from the European Pulsar Timing Array III. Search for gravitational wave signals
• Search for an isotropic gravitational-wave background with the Parkes Pulsar Timing Array
• Searching for the nano-Hertz stochastic gravitational wave background with the Chinese Pulsar Timing Array Data Release I
• The NANOGrav 15-year Data Set: Search for Signals from New Physics
• A little inflation in the early universe at the QCD phase transition
• A little inflation at the cosmological QCD phase transition
• Imprints of the QCD Phase Transition on the Spectrum of Gravitational Waves
• The Trajectory of the Cosmic Plasma Through the Quark Matter Phase Diagram
• Gravitational waves generated from the cosmological QCD phase transition within AdS/QCD
• Constraints on holographic QCD phase transitions from PTA observations
• Stochastic gravitational waves produced by the first-order QCD phase transition
• Nanohertz gravitational waves and primordial quark nuggets from dense QCD matter in the early universe
• Transition rate and gravitational wave spectrum from first-order QCD phase transitions
• Lepton asymmetry and the cosmic QCD transition
• Detection of gravitational waves from the QCD phase transition with pulsar timing arrays
• Cosmic QCD Epoch at Nonvanishing Lepton Asymmetry
• Cosmology meets functional QCD: First-order cosmic QCD transition induced by large lepton asymmetries
• Baryogenesis and first-order QCD transition with gravitational waves from a large lepton asymmetry
• The QCD transition temperature: results with physical masses in the continuum limit

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