Employing Precision Frequency Metrology for Axion Detection

Precision frequency metrology can overcome critical challenges in axion dark matter searches based on the power detection method. Using a generalization of the standard axion haloscope approach onto a case with two resonant modes, it is demonstrated how dark matter axion signal is converted into resonant mode phase fluctuations. The method is not only sensitive enough in principle to achieve the predicted model bands, but also remove the main complications such as the need for strong magnetic fields, large cavity volumes, and quantum sensors making the whole experiment much more cost effective.