99 citations · 316 across the 14 of their papers we have counts for
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hep-th2022★ 7 cited
Axion Quality Problem and Non-Minimal Gravitational Coupling in the Palatini Formulation
Dhong Yeon Cheong, Koichi Hamaguchi, Yoshiki Kanazawa +3
In axion models, the global U(1) Peccei-Quinn (PQ) symmetry is explicitly broken by non-perturbative effects of gravity, such as axionic wormholes. The gravitational violation of t…
astro-ph.CO2022★ 51 cited
Boltzmann or Bogoliubov? Approaches Compared in Gravitational Particle Production
Kunio Kaneta, Sung Mook Lee, Kin-ya Oda
Gravitational particle production is a minimal contribution to reheating the Universe after the end of inflation. To study this production channel, two different approaches have co…