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hep-th2025★ 3 cited
Loops in inflation with strongly non-geodesic motion
Sebastian Garcia-Saenz, Yizhou Lu, Sébastien Renaux-Petel
We study loop corrections in the effective field theory of inflation with imaginary speed of sound, which has been shown to provide an effective description of multi-field inflatio…
astro-ph.CO2025★ 4 cited
On the Gauge Invariance of Secondary Gravitational Waves
Chen Yuan, Yizhou Lu, Zu-Cheng Chen +1
Second-order tensor perturbations induced by primordial fluctuations play a crucial role in probing small-scale physics, but gauge dependence of their energy density has remained a…