[RBRC seminar] Extending the Reach of Gravitational-Wave Cosmology

by Mr Saba Shalamberidze (Stony Brook University)

Thursday 4 Jun 2026, 12:30 → 14:30 US/Eastern

2-160 (https://bnl.zoomgov.com/j/1600983728?pwd=RAD7OLcqre7Ycsp6JfFp6HAnpyLxex.1)

Gravitational wave measurements can open an observational window onto the early Universe and physics at energy scales inaccessible to terrestrial experiments. In this context, two targets are especially important: high-frequency gravitational waves, which are expected to be especially relevant for cosmological signals in a largely unexplored frequency range, and the chirality of stochastic gravitational wave backgrounds, which would be a distinctive signature of primordial parity violation and symmetry breaking. This presentation discusses two proposed strategies for accessing these targets. The first proposal uses qumodes, a concept from quantum information, to enhance high-frequency searches based on gravitational wave-photon conversion in magnetized resonant cavities. The second proposal introduces a tilted arm extension of the Einstein Telescope, a planned third-generation underground gravitational wave observatory, creating a non-coplanar detector configuration that can isolate the circular polarization of a stochastic gravitational wave background. These proposals show how tools from quantum computing and new interferometer geometries can extend the reach of gravitational wave cosmology.