English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Gravitational perturbations from oscillons and transients after inflation

MPS-Authors
/persons/resource/persons216895

Lozanov,  Kaloian D.
Physical Cosmology, MPI for Astrophysics, Max Planck Society;

External Ressource
No external resources are shared
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Lozanov, K. D., & Amin, M. A. (2019). Gravitational perturbations from oscillons and transients after inflation. Physical Review D, 99(12): 123504. doi:10.1103/PhysRevD.99.123504.


Cite as: http://hdl.handle.net/21.11116/0000-0004-484E-5
Abstract
We study the scalar and tensor perturbations generated by the fragmentation of the inflaton condensate into oscillons or transients after inflation, using nonlinear classical lattice simulations. Without including the backreaction of metric perturbations, we find that the magnitude of scalar metric perturbations never exceeds a few ×10−3, whereas the maximal strength of the gravitational wave signal today is Oð10−9Þ for standard postinflationary expansion histories. We provide parameter scalings for the α-attractor models of inflation, which can be easily applied to other models. We also discuss the likelihood of primordial black hole formation, as well as conditions under which the gravitational wave signal can be at observationally interesting frequencies and amplitudes. Finally, we provide an upper bound on the frequency of the peak of the gravitational wave signal, which applies to all preheating scenarios.