Time-crystal ground state and production of gravitational waves from QCD phase transition A.A and A.M. acknowledge support by the NSFC(11875113), the Shanghai Municipality(KBH1512299), and by Fudan University(JJH1512105). R.P. was partially supported by the Swedish Research Council, contract numbers 621-2013-428 and 2016-05996, by CONICYT grant MEC80170112 (Chile), as well as by the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme(668679). This work was supported in part by the Ministry of Education, Youth and Sports of the Czech Republic, project LT17018. The work has been performed in the framework of COST Action CA15213 “Theory of hot matter and relativistic heavy-ion collisions” (THOR)

Addazi, Andrea ( Department of Physics & Center for Field Theory and Particle Physics, Fudan University, Shanghai 200433, China) ; Marcianò, Antonino ( Department of Physics & Center for Field Theory and Particle Physics, Fudan University, Shanghai 200433, China) ; Pasechnik, Roman ( Department of Astronomy and Theoretical Physics, Lund University, Lund SE-223 62, Sweden)

20 May 2019

Abstract: 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.


Published in: Chinese Phys. C 43 (2019) 065101
Published by: Institute of Physics Publishing/Chinese Academy of Sciences
DOI: 10.1088/1674-1137/43/6/065101
arXiv: 1812.07376
License: CC-BY-3.0



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