2016/04/07 by Gary Prézeau, Prezeau, Gary · 1 citation
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Instrumentation and Detectors (physics.ins-det) #Instrumentation and Methods for Astrophysics (astro-ph.IM) #Nuclear Experiment (nucl-ex) #Physics of Superconductivity and Magnetism
paper · pdf · doi:10.48550/arxiv.1604.02152
openalex publication_date 2016/04/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
A tool that can constrain, in minutes, beyond-the-standard-model parameters like electric dipole moments (EDM) down to a lower-bound de^\calN<10-37e\cdotcm in bulk materials, or the coupling of axion-like particles (ALP) to photons down to |Gaγγ|<10-16~GeV-1, is described. Best limits are dne<3⋅10-26e\cdotcm for neutron EDM and |Gaγγ|<6.6⋅10-11~GeV-1. The \it dipole amplifier is built from a superconducting loop immersed in a toroidal magnetic field, B. When nuclear magnetic moments in the London penetration depth align with B, the bulk magnetization is always accompanied by an EDM-induced bulk electric field E∝B that generates detectable oscillatory supercurrents with a characteristic frequency ωD∝ de^\calN. Cold dark matter (CDM) ALP are formally similar where ωD∝ |Gaγγ|√(na/(2ma)) with ma the ALP mass and na its number density. A space probe traversing a dark matter hair with a dipole amplifier is sensitive enough to detect ALP density variations if |Gaγγ|√(nh/(2ma))>4.9⋅10-27 where nh is the ALP number density in the hair.