## 23 Citations

### Efficient self-resonance instability from axions

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2019

It was recently shown that a coherent oscillation of an axion can cause an efficient parametric resonance, leading to a prominent emission of the gravitational waves (GWs). In this paper, conducting…

### Perturbation approach to the Hill equation with a slowly varying parameter with application to the inflationary cosmology

- MathematicsJournal of Mathematical Physics
- 2018

We develop a general perturbative approach to solving the Hill equation with a slowly varying parameter based on the Floquet theory and asymptotic expansions in the vicinity of the exact solutions…

### Cosmic bubble and domain wall instabilities I: parametric amplification of linear fluctuations

- Physics
- 2014

This is the first paper in a series where we study collisions of nucleated bubbles taking into account the effects of small initial (quantum) fluctuations in a fully 3+1-dimensional setting. In this…

### Inflaton fragmentation and oscillon formation in three dimensions

- Physics
- 2010

Analytical arguments suggest that a large class of scalar field potentials permit the existence of oscillons — pseudo-stable, non-topological solitons — in three spatial dimensions. In this paper we…

### Inflaton Fragmentation and Oscillon Formation in Three Dimensions

- Physics
- 2010

Analytical arguments suggest that a large class of scalar field potentials permit the existence of oscillons -- pseudo-stable, non-topological solitons -- in three spatial dimensions. In this paper…

### Preheating in derivatively coupled inflation models

- Physics
- 2008

We study preheating in theories where the inflaton couples derivatively to scalar and gauge fields. Such couplings may dominate in, for example, models of natural inflation, in which the flatness of…

### Can axion clumps be formed in a pre-inflationary scenario?

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2021

The QCD axion and an axion-like particle (ALP) are compelling candidates of dark matter. For the QCD axion, it is known that when the Peccei-Quinn (PQ) symmetry is spontaneously broken after…

### Decay rates of Gaussian-type I-balls and Bose-enhancement effects in 3+1 dimensions

- Physics
- 2014

I-balls/oscillons are long-lived spatially localized lumps of a scalar field which may be formed after inflation. In the scalar field theory with monomial potential nearly and shallower than…

### Localized modes in a variety of driven long Josephson junctions with phase shifts

- Physics
- 2018

We study both analytically and numerically the localized modes in long Josephson junctions with phase shift formations, so-called $$0{-}\pi {-}0$$0-π-0 and $$0{-}\kappa $$0-κ junctions. The system is…

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