Speaker
Description
The axion, first proposed to resolve the unobserved-yet-expected CP violation in QCD, is an excellent candidate for wave-like dark matter. The most successful experimental technique to search for galactic axions thus far, the cavity haloscope, is limited in both scan speed and accessible axion mass range (or frequency range), particularly above 1.5 GHz. Next generation axion haloscopes will scan higher frequencies using arrays of identical cavities, presenting new opportunities to use quantum technologies to surpass the standard quantum limit beyond the squeezing and state-swapping techniques being explored for single-cavity searches. Inter-cavity multi-mode correlations have the potential to further elevate the scan rate of an array from linear scaling with cavity number to quadratic at the Heisenberg limit. This talk presents efforts at PNNL (Pacific Northwest National Lab), WUSTL (Washington University in St. Louis), UCB (University of California Berkeley), & LLNL (Lawrence Livermore National Lab) as part of the VEBAX pathfinder building capability to prepare and measure multi-mode states in tunable axion cavity haloscope arrays, forging a way for searches to reach the Heisenberg limit.
| Primary Abstract Topic | Experiment: Axions and Wave-Like-DM |
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