# Primordial black holes from thermal inflation

@article{Dimopoulos2019PrimordialBH, title={Primordial black holes from thermal inflation}, author={Konstantinos Dimopoulos and Tommi Markkanen and Antonio Racioppi and Ville Vaskonen}, journal={Journal of Cosmology and Astroparticle Physics}, year={2019} }

We present a novel mechanism for the production of primordial black holes (PBHs). The mechanism is based on a period of thermal inflation followed by fast-roll inflation due to tachyonic mass of order the Hubble scale. Large perturbations are generated at the end of the thermal inflation as the thermal inflaton potential turns from convex to concave. These perturbations can lead to copious production of PBHs when the relevant scales re-enter horizon. We show that such PBHs can naturally account…

## 10 Citations

Primordial black holes dark matter from inflection point models of inflation and the effects of reheating

- Physics
- 2019

We study the generation of primordial black holes (PBH) in a single field inflection point model of inflation wherein the effective potential is expanded up to the sextic order and the inversion…

Stochastic induced gravitational waves and lowest mass limit of primordial black holes with the effects of reheating

- Physics
- 2020

Recently, we have studied the abundance of primordial black holes (PBH) produced in a single field inflationary model with a polynomial potential containing even powers up to the sextic order which…

Primordial black hole remnants as dark matter produced in thermal, matter, and runaway-quintessence postinflationary scenarios

- PhysicsPhysical Review D
- 2019

We investigate the cosmology of mini Primordial Black Holes (PBHs) produced by large density perturbations. The mini PBHs evaporate promptly in the early universe and we assume that a stable remnant…

Escape from supercooling with or without bubbles: gravitational wave signatures

- PhysicsThe European Physical Journal C
- 2021

Quasi-conformal models are an appealing scenario that can offer naturally a strongly supercooled phase transition and a period of thermal inflation in the early Universe. A crucial aspect for the…

Primordial black holes in Higgs-R2 inflation as the whole of dark matter

- Physics
- 2021

Primordial black holes are produced in a minimal UV extension to the Higgs inflation with an included R2 term. We show that for parameters consistent with Standard Model measurements and Planck…

Small scale induced gravitational waves from primordial black holes, a stringent lower mass bound, and the imprints of an early matter to radiation transition

- Physics
- 2021

In all inflationary scenarios of primordial black holes (PBH) formation, amplified scalar perturbations inevitably accompany an induced stochastic gravitational waves background (ISGWB) at smaller…

The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe

- PhysicsThe Open Journal of Astrophysics
- 2021

It is commonly assumed that the energy density of the Universe was dominated by radiation between reheating after inflation and the onset of matter domination 54,000 years later. While the abundance…

Formation of primordial black holes from warm inflation

- Physics
- 2019

Primordial Black Holes (PBHs) serve as a unique probe to the physics of the early Universe, particularly inflation. In light of this, we study the formation of PBHs by the collapse of overdense…

On bubble collisions in strongly supercooled phase transitions

- Physics
- 2019

We study strongly supercooled cosmological phase transitions. We perform numerical lattice simulations of two-bubble collisions and demonstrate that, depending on the scalar potential, in the…

Primordial Black Holes in Higgs-$R^2$ Inflation as a whole dark matter

- Physics
- 2019

Primordial black holes are produced in a minimal UV extension to the Higgs inflation with an included $R^2$ term. We show that for parameters consistent with Standard Model measurements and Planck…

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