M. Silva-Feaver

Effective Sub-Quantum Readout for Non-Monochromatic Axion Signals in High-$Q$ Haloscopes

The search for wave-like dark matter using microwave cavity haloscopes is constrained by the Standard Quantum Limit, which dictates that phase-preserving linear amplification results in a minimum of one quantum of total system noise for a narrow-band signal. We demonstrate that this limit is effectively halved for a no...