Speaker
Tongxuan Zhang
(LMU Munich and Max Planck Institute for Physics)
Description
We propose a novel interferometric approach to axion searches based on long, coiled optical fibers in an external magnetic field. Considering fiber boundary conditions and bending, I will show that in silica fibers the leading signal is a phase shift of the photon. A key observation is that the axion field will effectively get confined along the fiber, despite no direct interaction between axions and the fiber material. In contrast, there exist parameter regions where axion leakage occurs. Due to this, I will show that hollow-core fibers with a refractive index close to unity can yield significantly enhanced signals. These setups have the potential to set new constraints, especially in the regime of large axion mass.
Authors
Gia Dvali
Sebastian Zell
(LMU Munich)
Tongxuan Zhang
(LMU Munich and Max Planck Institute for Physics)