The current and upcoming generations of gravitational wave experiments represent an exciting step forward in terms of detector sensitivity and performance. Key upgrades at the LIGO, Virgo and KAGRA facilities will see the next observing run (O4) probe a spatial volume around four times larger than the previous run (O3), and design implementations for e.g. the Einstein Telescope, Cosmic...
I will present a new concept of a resonant, high frequency GW detector which operates on the basis of optical levitation. This detector will be sensitive to galactic BH superradiance signals, especially those from axions at the GUT scale. I will describe the working principle, the experimental progress, and the projected sensitivity of this detector to continuous GWs.
Detection of continuous waves will open a new frontier in multi-messenger astronomy. I summarize detection prospects for the four main scenarios - pulsar searches, Sco X-1 type directed searches, Cas A type directed searches, and all sky surveys. I include developments in gravitational wave interferometry from now to Einstein Telescope and Cosmic Explorer, and contemporary electromagnetic...
