English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We present for smooth non-oscillating backgrounds an analytic formula whichcalculates the energy density of massive and massless particles created viagravitational particle production, thus giving the corresponding reheatingtemperature. It can be applied to models of Quintessential Inflation such as$\alpha$-attractors, and shows that for masses larger than the Hubble rate atthe end of inflation, namely $H_{END}$, the reheating temperature isexponentially suppressed. On the contrary, for masses of the order of $H_{END}$one obtains a maximum reheating temperature of the order of $10^7$ GeV.Finally, to overcome the constraints coming from the overproduction ofGravitational Waves in Quintessential Inflation, we have shown that the viablemasses which ensure the Big Bang Nucleosynthesis success are in the rangebetween {$2\times 10^{10}$ GeV and $ 4\times 10^{13}$ GeV}, leading to amaximum reheating temperature of the order {$10^5-10^7$ GeV}.

An analytic formula to calculate the reheating temperature via gravitational particle production