269 citations · 1.6k across the 55 of their papers we have counts for
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hep-th2017★ 6 cited
Entanglement Entropy and Decoupling in the Universe
Yuichiro Nakai, Noburo Shiba, Masaki Yamada
In the expanding universe, two interacting fields are no longer in thermal contact when the interaction rate becomes smaller than the Hubble expansion rate. After decoupling, two s…
hep-ph2017★ 6 cited
Axion production from primordial magnetic fields
Kohei Kamada, Yuichiro Nakai
Production of axionlike particles (ALPs) by primordial magnetic fields may have significant impacts on cosmology. We discuss the production of ALPs in the presence of the primordia…