Gravity waves generated by sounds from cosmological phase transitions
by
Tigran Kalaydzhyan(Stony Brook)
→
Europe/Berlin
DESY Hamburg
DESY Hamburg
Description
In this talk I will comment on a possibility of the gravity wave generation from sounds in the early Universe. The sounds themselves are created by inhomogeneities associated with cosmological QCD and electroweak phase transitions, and (if the sound dispersion law allows) are further involved in an inverse acoustic cascade, drastically increasing the sound amplitude at the Hubble scale. The gravity waves created during the QCD transition are expected to be detectable in the near future by means of the pulsar timing arrays.
