3 papers
gr-qc2026
Octupolar Gravitational Radiation in de Sitter Spacetime
Harsh, Omkar Shetye, Amitabh Virmani
We derive the gravitational radiation generated by a localised matter source in de Sitter spacetime at octupolar order in the multipolar expansion, working in generalised harmonic…
hep-th2025
Influence Phase of a dS Observer II: Electromagnetism
R. Loganayagam, Omkar Shetye
We extend our proposal for static patch holography made in part I (arXiv:2309.07290) to the case of electromagnetism. Using the on-shell action on de Sitter Schwinger-Keldysh (dS-S…
hep-th2023
Influence Phase of a dS Observer I : Scalar Exchange
R. Loganayagam, Omkar Shetye
Inspired by real-time computations in AdS black holes, we propose a method to obtain the influence phase of a cosmological observer by calculating the on-shell action on a doubled…