Time-crystal ground state and production of gravitational waves from QCD phase transition

Research output: Contribution to journalArticle


We propose a novel mechanism for the production of gravitational waves in the early Universe that originates from the relaxation processes induced by the QCD phase transition. While the energy density of the quark-gluon mean-field is monotonously decaying in real time, its pressure undergoes a series of violent oscillations at the characteristic QCD time scales that generate a primordial multi-peaked gravitational waves signal in the radio frequencies' domain. The signal is an echo of the QCD phase transition that is accessible by planned measurements at the FAST and SKA telescopes.


External organisations
  • Fudan University
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics
Original languageEnglish
Article number065101
JournalChinese Physics C
Issue number6
Publication statusPublished - 2019 Jun 1
Publication categoryResearch