Gravity waves generated by sounds from cosmological phase transitions

by Tigran Kalaydzhyan (Stony Brook)

Monday 16 Mar 2015, 16:30 → 17:30 Europe/Berlin

DESY Hamburg

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.