The evidence for cold dark matter in the Universe, with a mean density about 5 times that of baryonic matter, is nowadays clear beyond reasonable doubt. Among the candidates for dark matter, the original pseudoscalar axion stands out as a prediction from a theory that was purely conceived to solve a fundamental and inescapable problem in particle physics, the strong CP problem. Experiments using resonant cavities in strong magnetic fields have been pushing the upper limits to the axion-photon coupling at various axion masses to the interesting range of the axion model prediction.

At present, superconducting transmons are a promising technology to increase the sensitivity of single photon detection by a large factor, allowing axionsearches to reach masses and couplings of high theoretical expectation for a potential discovery. In this talk I will present a reanalysis of the data of the first non-demolition experiment by Dixit et al. (2021), which points to the technical progress thatis needed to make these experiments reach an optimal sensitivity.