Publications (5)
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…
Towards the Parametric Renormalization of the S-matrix -- I
Pinaki Banerjee, Harsh, Alok Laddha
Zimmermann's forest formula is the corner stone of perturbative renormalization in QFT. By renormalizing individual Feynman graphs, it generates the UV finite S-matrix. This approa…
Consistent Truncation of Linearized gravitational waves in de Sitter space-time
Ghanashyam Date, Harsh
An important step in using observations of gravitational waves from bounded sources is to relate the observed waveforms far away from a source to the local dynamics and environment…
de Sitter Teukolsky waves
Harsh, Sk Jahanur Hoque, Sitender Pratap Kashyap +1
We present de Sitter Teukolsky waves -- linearised quadrupolar gravitational waves in the transverse-traceless gauge in de Sitter spacetime. In the cosmological constant going…
Single Particle Detection System for Strong-Field QED Experiments
F. C. Salgado, N. Cavanagh, M. Tamburini +23
Measuring signatures of strong-field quantum electrodynamics (SF-QED) processes in an intense laser field is an experimental challenge: it requires detectors to be highly sensitive…