143 citations · 880 across the 47 of their papers we have counts for
48 papers
Indirect Parametric Resonance of the Electromagnetic Field Driven by an Oscillating SU(2) Dark Matter Condensate
Tatsuya Daniel, Vahid Kamali, Robert Brandenberger
We study a local patch of an axion-like dark sector in Minkowski spacetime, containing an initially homogeneous and isotropic non-Abelian condensate, and a real pseudoscala…
Minimal Preheating
Robert Brandenberger, Vahid Kamali, Rudnei O. Ramos
An oscillating inflaton field induces small amplitude oscillations of the Hubble parameter at the end of inflation. These Hubble parameter induced oscillations, in turn, trigger pa…
Decay of ALP Condensates via Gravitation-Induced Resonance
Robert Brandenberger, Vahid Kamali, Rudnei O. Ramos
Oscillating scalar field condensates induce small amplitude oscillations of the Hubble parameter which can induce a decay of the condensate due to a parametric resonance instabilit…
Recent developments in warm inflation
Vahid Kamali, Meysam Motaharfar, Rudnei O. Ramos
Warm inflation, its different particle physics model implementations and the implications of dissipative particle production for its cosmology are reviewed. First, we briefly prese…
Unitarity Problems for an Effective Field Theory Description of Early Universe Cosmology
Robert Brandenberger, Vahid Kamali
In the context of Effective Field Theory, the Hilbert space of states increases in an expanding universe. Hence, the time evolution cannot be unitary. The formation of structure is…
Minimal warm inflation and TCC
Vahid Kamali, Hossein Moshafi, Saeid Ebrahimi
The minimal warm inflation model was constructed as a warm inflation setup with direct interaction between inflaton and (non-Abelian) gauge fields. The model was shown to be compat…