254 citations · 1.8k across the 33 of their papers we have counts for
6 papers · 1 filter
Axion anomalies
Peter Adshead, Kaloian D. Lozanov
We study fermions derivatively coupled to axion-like or pseudoscalar fields, and show that the axial vector current of the fermions is not conserved in the limit where the fermion…
Lattice simulations of Abelian gauge fields coupled to axions during Inflation
Angelo Caravano, Eiichiro Komatsu, Kaloian D. Lozanov +1
We use a lattice simulation to study a model of axion inflation where the inflaton is coupled to a U(1) gauge field through Chern-Simons interaction. These kinds of models have alr…
Non-Gaussianity and the induced gravitational wave background
Peter Adshead, Kaloian D. Lozanov, Zachary J. Weiner
Scalar metric fluctuations generically source a spectrum of gravitational waves at second order in perturbation theory, poising gravitational wave experiments as potentially powerf…
Lattice Simulations of Inflation
Angelo Caravano, Eiichiro Komatsu, Kaloian D. Lozanov +1
The scalar field theory of cosmological inflation constitutes nowadays one of the preferred scenarios for the physics of the early universe. In this paper we aim at studying the in…
Spillway Preheating
JiJi Fan, Kaloian D. Lozanov, Qianshu Lu
In traditional models only an order one fraction of energy is transferred from the inflaton to radiation through nonperturbative resonance production in preheating immediately afte…
Self-gravitating Vector Dark Matter
Peter Adshead, Kaloian D. Lozanov
We derive the non-relativistic limit of a massive vector field. We show that the Cartesian spatial components of the vector behave as three identical, non-interacting scalar fields…