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astro-ph.CO2026
(Re)constructing Accurate Axion Oscillations
Hoang Nhan Luu, Chanda Prescod-Weinstein
The cosmological evolution of ultralight axions typically involves rapid oscillations on the timescale of the inverse mass, making it challenging to resolve the dynamics at both th…
astro-ph.CO2026
A Tale of Two Gauges: Effective Field Theory for Relativistic Behavior of Cosmological Axions
Hoang Nhan Luu, Chanda Prescod-Weinstein
In this work, we present a formalism to model the relativistic behavior of axions. The relativistic behavior of axions is surprisingly difficult to model precisely, as it involves…