2019/12/31 by Robert Lasenby · 2 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Axion #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Dark Matter and Cosmic Phenomena #Dark matter #Electronic engineering #Field (mathematics) #Low frequency #Magnetic field #Microwave #Microwave cavity #Optics #Particle physics #Photon #Physics #Quantum mechanics #Sensitivity (control systems) #Superconductivity #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.102.015008
published as Phys. Rev. D 102, 015008 (2020) · 20 pages, 6 figures; v3: updates for clarity, matches version accepted for Phys Rev D
arxiv created 2020/06/13 · openalex publication_date 2020/07/14 · arxiv updated 2020/07/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
For low-mass (frequency \ensuremath≪GHz) axions, dark matter detection experiments searching for an axion-photon-photon coupling generally have suppressed sensitivity, if they use a static background magnetic field. This geometric suppression can be alleviated by using a high-frequency oscillating background field. Here, we present a high-level sketch of such an experiment, using superconducting cavities at \ensuremath∼GHz frequencies. We discuss the physical limits on signal power arising from cavity properties, and point out cavity geometries that could circumvent some of these limitations. We also consider how backgrounds, including vibrational noise and drive signal leakage, might impact sensitivity. While practical microwave field strengths are significantly below attainable static magnetic fields, the lack of geometric suppression, and higher quality factors, may allow superconducting cavity experiments to be competitive in some regimes.