Speaker
Description
Axions represent a leading class of dark matter candidate that has gained considerable interest in recent years. In order to probe its largely unexplored axion parameter space across multiple frequency decades, new experimental techniques are required. The HAYSTAC (Haloscope At Yale Sensitive To Axion Cold dark matter) experiment is a tunable microwave cavity experiment searching for axions, which also serves as an R&D testbed for new technologies in the 10-50 𝜇eV mass range. HAYSTAC Phase 2 has already successfully operated and published data with a receiver based on squeezed-vacuum states to evade the Standard Quantum Limit. This was the first-ever dark matter experiment to do so, and along with LIGO, only one of two search experiments in fundamental physics to utilize squeezed states for data production. In this talk, I will review recent science results from HAYSTAC, as well as new resonator and receiver technologies under development. These include photonic band gap resonators, and a cavity entanglement and state-exchange scheme which promises to accelerate the search by an order of magnitude.
