Experimental test of entanglement and swapping protocol for quantum enhanced visibility bandwidth*

Cavity-based axion detectors exploit the axion field's hypothesized coupling to electromagnetism to sweep through possible masses looking for a weak, narrowband signal. Even with techniques to circumvent the standard quantum limit, the spectral scan rate of these detectors is severely limited, making the search for axions prohibitively resource intensive with current technology. Here we present experimental progress towards a method of scan rate enhancement based on the parametric coupling of an axion-sensitive cavity to an auxiliary readout mode. Using a Josephson Ring Modulator (JRM) as a 3-wave mixing element, we induce simultaneous squeezing and state swapping interactions between two on chip resonant circuits that result in amplification of a potential hidden photon signal relative to measurement noise. In this talk, I will describe results from a proof-of-concept demonstration.