The author of the hypothesis argued that the universe might actually be “bathed in alien chatter and other forms of distributed quantum information processing”.
A quantum physicist from Imperial College London named Terry Rudolph has brought forth a bold new hypothesis about how aliens might communicate across space, with us being none the wiser.
Laying out his hypothesis in a pre-print paper, Rudolph postulated that extraterrestrials might render their communications indistinguishable from thermal radiation emitted by stars.
As IFLScience elaborates, aliens could “send messages by entangling photons in separate stars, altering the light that is given off by one star by interfering with another”, with the recipients of said messages only having to observe the second star “using linear optics” to glean the missives’ contents.
Rudolph pointed out, however, that “this is all fundamentally hidden from us if quantum theory is correct”, adding that, if the quantum theory isn’t correct, then “presumably the aliens know that and so are not using this method”.