1.1k citations · 5k across the 46 of their papers we have counts for
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NANOGrav spectral index from melting domain walls
E. Babichev, D. Gorbunov, S. Ramazanov +2
We discuss cosmic domain walls described by a tension red-shifting with the expansion of the Universe. These melting domain walls emit gravitational waves with the low-frequency sp…
Gravitational shine of dark domain walls
E. Babichev, D. Gorbunov, S. Ramazanov +1
Cosmic domain walls are harmless, provided that their tension decreases with expansion of the Universe. This setup can be realized, if the scale of spontaneous symmetry breaking is…
Beyond freeze-in: Dark Matter via inverse phase transition and gravitational wave signal
S. Ramazanov, E. Babichev, D. Gorbunov +1
We propose a novel scenario of Dark Matter production naturally connected with generation of gravitational waves. Dark Matter is modelled as a real scalar, which interacts with the…
Price for Environmental Neutrino-Superluminality
Gia Dvali, Alexander Vikman
We ask whether the recent OPERA results on neutrino superluminality could be an environmental effect characteristic of the local neighborhood of our planet, without the need of vio…
The Classical Stability Of The Ghost Condensate
Alexey Anisimov, Alexander Vikman
We discuss classical stability of the cosmological mechanism which is responsible for the ghost condensation. We show that the simplest general covariant effective action which inc…