3 papers
hep-th2026
Cosmological Collider Signals at Strong Mixing
Xiangwei Wang, Yi Wang, Yunke Zhao
We study cosmological collider signatures in a two-field inflationary system with constant-turn derivative mixing between the canonically normalized curvature fluctuation and a mas…
gr-qc2026
On Cosmological Correlators with Boundary Contributions
Yanjiao Ma, Dong-Gang Wang, Xiangwei Wang +2
Cosmological correlators receive contributions from both field interactions in the bulk of quasi-de Sitter (dS) spacetime and boundary terms at the end of inflation. While most of…
hep-th2025
Interact or Twist: Cosmological Correlators from Field Redefinitions Revisited
Donggang Wang, Xiangwei Wang, Yi Wang +1
In cosmology, correlation functions on a late-time boundary can arise from both field redefinitions and bulk interactions, which are usually believed to generate distinct results.…