29 citations · 70 across the 8 of their papers we have counts for
8 papers
Amnesia in the Axion Misalignment Landscape
Kierthika Chathirathas, Cem Eröncel, Mathieu Kaltschmidt +2
Pre-inflationary axion cosmologies admit a broad range of initial velocities and angles that generate a landscape of misalignment histories, whose nonlinear fate and small-scale st…
Enhanced primordial gravitational waves from a stiff post-inflationary era due to an oscillating inflaton
Chao Chen, Konstantinos Dimopoulos, Cem Eröncel +1
We investigate two classes of inflationary models, which lead to a stiff period after inflation that boosts the signal of primordial gravitational waves (GWs). In both families of…
Gravitational signatures of ALP dark matter fragmentation
Aleksandr Chatrchyan, Cem Eröncel, Matthias Koschnitzke +1
The misalignment mechanism for axion-like particles (ALPs) is a leading explanation for dark matter. In this work we investigate ALPs with non-periodic potentials, which allow for…
New Horizons in the Holographic Conformal Phase Transition
Cem Eröncel, Jay Hubisz, Seung. J. Lee +2
We describe cosmological solutions of the holographic dilaton with the aim of exploring alternatives to the commonly studied thermal Randall-Sundrum phase transition. It is well kn…
ALP dark matter with non-periodic potentials: parametric resonance, halo formation and gravitational signatures
Aleksandr Chatrchyan, Cem Eröncel, Matthias Koschnitzke +1
Axion-like particles (ALPs) are leading candidates to explain the dark matter in the universe. Their production via the misalignment mechanism has been extensively studied for cosi…
ALP Dark Matter Mini-Clusters from Kinetic Fragmentation
Cem Eröncel, Géraldine Servant
We show that very compact axion mini-clusters can form in models where axion-like-particle (ALP) dark matter is produced via the kinetic misalignment mechanism, which is well-motiv…
ALP Dark Matter from Kinetic Fragmentation: Opening up the Parameter Window
Cem Eröncel, Ryosuke Sato, Geraldine Servant +1
The main mechanism responsible for Axion-Like-Particle (ALP) production in the early universe is the so-called misalignment mechanism. Three regimes have been investigated in this…
Exact Renormalization Group for Point Interactions
Cem Eröncel, O. Teoman Turgut
Renormalization is one of the deepest ideas in physics, yet its exact implementation in any interesting problem is usually very hard. In the present work, following the approach by…