4 papers
Constraints on self-interacting Q-ball dark matter
K. Enqvist, A. Jokinen, T. Multamaki +1
We consider different types of Q-balls as self-interacting dark matter. For the Q-balls to act as the dark matter of the universe they should not evaporate, which requires them to…
Large-scale magnetic fields from hydromagnetic turbulence in the very early universe
Axel Brandenburg, Kari Enqvist, Poul Olesen
We investigate hydromagnetic turbulence of primordial magnetic fields using magnetohydrodynamics (MHD) in an expanding universe. We present the basic, covariant MHD equations, find…
On the Non-Equilibrium Early Universe
P. Elmfors, K. Enqvist, I. Vilja
We study non--equilibrium ensemble corrections to particle masses and the effective potential in the early universe, using a uniform momentum distribution as an example. The result…
On Primordial Magnetic Fields of Electroweak Origin
K. Enqvist, P. Olesen
We consider Vachaspati's primordial magnetic field which is generated at the electroweak phase transition. Assuming that either the gradients of the Higgs field or, alternatively,…