Axion Dark Matter Search with Optical Interferometers (Zoom: https://mppmu.zoom.us/j/99300254726)

by Dr Ippei Obata (Max Planck Institute for Astrophysics)

Thursday 12 Nov 2020, 11:00 → 12:00 Europe/Berlin

zoom

Abstract: Axion dark matter differentiates the phase velocities of the circular-polarized photons. In this talk, we present a scheme to measure its phase difference by using a linear optical cavity. We applied this scheme to the Fabry-Perot arm of gravitational wave detectors such as DECIGO, CE, and aLIGO. We found that their potential sensitivities to the axion-photon coupling constant, g_{aγ}, can reach beyond the current limit of CAST with several orders of magnitude, at a wide axion mass range 10^{-16}eV < m < 10^{-9} eV. Our sensitivity can be achieved without losing any sensitivity to gravitational waves. In addition to that, we also introduce our tabletop axion dark matter experiment "DANCE" (Dark matter Axion search with riNg Cavity Experiment) and report the current status of the prototype version.