Heidelberg 2015 – scientific programme
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SYDM: Symposium Dipole Moments - A Tool to Search for New Physics
SYDM 3: Session 3
SYDM 3.8: Talk
Tuesday, March 24, 2015, 18:45–19:00, P/H1
Progress towards a Global Network of Optical Magnetometers for Exotic Physics — •Arne Wickenbrock1 and Elena Zhivun2 for the GNOME collaboration — 1Johannes Gutenberg Universität, Mainz, Germany — 2University of California, Berkeley, California, USA
We present first measurements and experimental progress on a recently proposed novel experimental scheme enabling the investigation of transient exotic spin couplings. The scheme is based on synchronous measurements of optical-magnetometer signals from several devices operating in magnetically shielded environments in distant locations (>100 km). Although signatures of such exotic couplings may be present in the signal from a single magnetometer, it would be challenging to distinguish them from noise. By analyzing the correlation between signals from multiple, geographically separated magnetometers, it is not only possible to identify the exotic transient but also to investigate its nature. The ability of the network to probe presently unconstrained physics beyond the Standard Model is examined by considering the spin coupling to stable topological defects (e.g., domain walls) of axion-like fields.