'Hidden photons' to send secret messages through Earth

April 25, 2009

Hidden photons are a class of particles predicted by so-called supersymmetric extensions to the standard model of particle physics. Unlike normal photons, hidden photons could have a tiny mass and would be invisible because they would not interact with the charged particles in conventional matter. This means hidden photons would flit through even the densest materials unaffected.

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[O]ver the 12,700-kilometre diameter of the Earth, the signal capacity would be just 1 bit per second.

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