In this talk I will talk about a precision measurement experiment to look for higher frequency gravitational waves (GWs). I will also summarize projects looking for dark matter signals in GW-detectors in multiple frequency bands.Gravitational waves at frequencies higher than the LIGO band can bring us completely new information about the universe. Besides being the most-interesting frequency region for looking at cosmological phenomena, they can also convey signatures of dark matter candidates like ultralight bosons through black hole super radiance and light primordial black holes (PBHs). I will introduce a new global initiative to study GW sources and detectors at ultra-high-frequencies (MHz-GHz), as well as a new experiment to look for GWs in the radio frequency band (10 kHz to 300 kHz) using levitated opto mechanical sensors. I will summarize the design of this radio-frequency levitated sensor detector (LSD), the current experimental progress, as well as a path forward for future improvements. I will also show upper limits that LSD could place on the light PBHs, as well as recent upper limits on ultralight PBHs using a new analysis technique on LIGO data. If time permits, I will also show a new way to look for dilatonic dark matter in the auxiliary channels of LIGO. Finally, I will give a sneak-peek into future experiments that will shine light on numerous questions in fundamental physics ranging from gravitational waves, dark matter, cosmology, beyond-the-standard- model physics, and quantum gravity.
Zoom link: https://icts-res-in.zoom.us/j/96552202490?pwd=jk2veGAuTChs98B4wCQLCbgLSQvjxd.1
Meeting ID: 965 5220 2490
Passcode: 977956