3 papers
hep-th2026
Splitting Rules from Kinematic Flow: Local Evolution and Emergent Time
Ji-Yuan Ke, Ping He
The differential equations satisfied by the wavefunction coefficients of conformally coupled scalars in a power-law cosmology can be recast as an iterative differential system of b…
astro-ph.CO2025
Precision calculation of the EFT likelihood with primordial non-Gaussianities
Ji-Yuan Ke, Yun Wang, Ping He
We perform a precision calculation of the effective field theory (EFT) conditional likelihood for large-scale structure (LSS) using the saddle-point expansion method in the presenc…
hep-ph2025
Calculating the EFT likelihood via saddle-point expansion
Ji-Yuan Ke, Yun Wang, Ping He
In this paper, we extend the functional approach for calculating the EFT likelihood by applying the saddle-point expansion. We demonstrate that, after suitable reformulation, the l…