From: John Berry Well, particles (electrons, protons, atoms, bucky balls, ignored cats) fired at a screen still produce an interference... So maybe protons could tunnel through a barrier if there is a wave from another proton that interferes?
John, Are you suggesting that the cone be filled with hydrogen in order to promote tunneling which then promotes photon pairing? That would be unlikely, since protons would then be lost to the continued operation of the device making it difficult to control. BTW - Here is the paper: http://scitation.aip.org/content/aip/journal/adva/6/6/10.1063/1.4953807 Note that if the pairing hypothesis is correct, then the cone angle could be important as well as the gas fill or vacuum, and other dimensions, as well as the geometric ratios which would favor phase conjugation. One would think a parabola would be favored over a cone. These parameters can be calculated based on the frequency of 2.45 MHz, the wavelength of about 12 cm. This explains why some designs work and others do not. The quantum energy of a microwave photon (using standard commercial magnetron) is only in the micro-eV range (10^-5 eV) which is well below ionizing. The interaction of photons at such low energy is limited to molecular rotation and torsion if there is a gaseous medium in the device, instead of vacuum. A dilute gas fill, such that the mean free path of the atoms (or molecules) was kept at wavelength resonance with the photons, could help (or hurt) depending on the design. http://www.physics-astronomy.com/2016/06/new-paper-claims-that-em-drive-doesnt.html#.V2LfsvkrKVM <http://www.physics-astronomy.com/2016/06/new-paper-claims-that-em-drive-doesnt.html> If protons can become paired and out-of-phase due to some kind of cavity resonance effect, such that one result of the pairing is that they can escape metal confinement, then almost every citizen is at risk from microwave
