From: Ron Kita
In the Wired article is a comment by Cathar Seamus...on a possible dark matter interaction at 100 Ghz. Here is the comment. Note that 100 GHz is in the W band, which is reserved by the military and NASA… just sayin’… “I believe that they might be hitting a dark matter resonance: microwave photons have approx. 10^-23 Joules = 10^-4 eV. Josephson-Junctions experiments discovered an axionic dark matter resonance at.. 0.11 meV. This cavity is tuned to 10^-25 Joule photons, if this connection I suspect is correct, the maximum thrust should occur at 100 GHz frequencies” http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.111.231801 Abstract We provide theoretical arguments that dark-matter axions from the galactic halo that pass through Earth may generate a small observable signal in resonant S/N/S Josephson junctions. The corresponding interaction process is based on the uniqueness of the gauge-invariant axion Josephson phase angle modulo 2π and is predicted to produce a small Shapiro steplike feature without externally applied microwave radiation when the Josephson frequency resonates with the axion mass. A resonance signal of so far unknown origin observed by C. Hoffmann et al. [Phys. Rev. B 70, 180503(R) (2004)] is consistent with our theory and can be interpreted in terms of an axion mass mac2=0.11 meV and a local galactic axionic dark-matter density of 0.05 GeV/cm3. We discuss future experimental checks to confirm the dark-matter nature of the observed signal.
