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Abstract
One possible solution of the cosmological constant problem involves a socalled qfield, which selfadjusts so as to give a vanishing gravitating vacuum energy density (cosmological constant) in equilibrium. We show that this qfield can manifest itself in other ways. Specifically, we establish a propagating mode (qwave) in the nontrivial vacuum and find a particular solitontype solution in flat spacetime, which we call a qball by analogy with the wellknown Qball solution. Both qwaves and qballs are expected to play a role for the equilibration of the qfield in the very early universe.
Original language  English 

Article number  1750103 
Pages (fromto)  113 
Journal  MODERN PHYSICS LETTERS A 
Volume  32 
Issue number  18 
DOIs  
Publication status  Published  2017 
MoE publication type  A1 Journal articlerefereed 
Keywords
 cosmological constant
 dark energy
 Relativistic wave equations
 solitons
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Projects

TOPVAC: From Topological Matter to Relativistic Quantum Vacuum
Volovik, G., Nissinen, J., Eltsov, V., Zhang, K., Rysti, J., Volard, M., Laurila, S. & Rantanen, R.
01/10/2016 → 31/01/2023
Project: EU: ERC grants

Centre of Excellence in Low Temperature Quantum Phenomena and Devices
Hietala, N., Mäkinen, J., Eltsov, V., Volovik, G. & Rysti, J.
01/01/2015 → 31/01/2018
Project: Academy of Finland: Other research funding