axion domain walls 1cosmic birefringence 1swampland conjectures 1ultralight scalars 1weak gravity conjecture 1
From the 1 of 3 linked papers with an AI index.
3 papers
hep-th2026
Wading the String Bog: CMB Birefringence in the Swampland
Guido D'Amico, Nemanja Kaloper, Alexander Westphal
The paper investigates how observations of cosmic microwave background birefringence can serve as experimental tests of Swampland conjectures, highlighting constraints from the Wea…
hep-ph2026
Very-High-Frequency Gravitational Waves from Multi-Monodromy Inflation
Guido D'Amico, Andrew A. Geraci, Nemanja Kaloper +1
We show that in multi-stage axion monodromy inflation an interruption near the end of the penultimate stage can lead to a spike in the gravitational wave background. These gravitat…
hep-th2024
Falsifying Anthropics
Nemanja Kaloper, Alexander Westphal
We propose using fuzzy axion dark matter to test the anthropic principle. A very light axion can be directly detectable, at least by black hole superradiance effects. The idea then…