Evolution of a domain wall in expanding universe: inflation and after it
Physics Department and Laboratory of Cosmology and Elementary Particle Physics, Novosibirsk State University, Pirogova st. 2, Novosibirsk, 630090 Russia
2 Theory Division, Institute for Theoretical and Experimental Physics, Bolshaya Cheremushkinskaya st. 25, Moscow, 117218 Russia
3 Theory Division, Budker Institute of Nuclear Physics, akademika Lavrentieva prospect 11, Novosibirsk, 630090 Russia
Published online: 31 October 2018
We study the evolution of thick domain walls in the expanding universe. We have found that the domain wall evolution crucially depends on the time-dependent parameter C(t) = 1/(H(t)δ0)2, where H(t) is the Hubble parameter and δ0 is the width of the wall in flat space-time. For C(t) > 2 the physical width of the wall, a(t)δ(t), tends with time to constant value δ0, which is microscopically small. Otherwise, when C(t) ≤ 2, the wall steadily expands and can grow up to a cosmologically large size.
© The Authors, published by EDP Sciences, 2018
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