Tachyons. Interesting stuff. I remember reading about them in the 60s in Scientific American.. At that time, scientists figured that tachyons sped up as they lost energy. They felt that a tachyon in densely filled space, would have had so many collisions that caused them to speed up, not slow down, that some tachyons were moving so fast, they were everywhere at the same time!
Wiki gives a newer interpretation, but they’re still very interesting!
“
The existence of such particles would pose intriguing problems in modern physics. For example, taking the formalisms of electromagnetic radiation and supposing a tachyon had an electric charge—as there is no reason to suppose a priori that tachyons must be either neutral or charged—then a charged tachyon must lose energy as Cherenkov radiation—just as ordinary charged particles do when they exceed the local speed of light in a medium. A charged tachyon travelling in a vacuum therefore undergoes a constant proper time acceleration and, by necessity, its worldline forms a hyperbola in spacetime. However, as we have seen, reducing a tachyon’s energy increases its speed, so that the single hyperbola formed is of two oppositely charged tachyons with opposite momenta (same magnitude, opposite sign) which annihilate each other when they simultaneously reach infinite velocity at the same place in space. (At infinite velocity the two tachyons have no energy each and finite momentum of opposite direction, so no conservation laws are violated in their mutual annihilation. The time of annihilation is frame dependent.) Even an electrically neutral tachyon would be expected to lose energy via gravitational Cherenkov radiation, since it has a gravitational mass, and therefore increase in velocity as it travels, as described above.
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Two equal but opposite fluctuations in the energy field that show up as a flat line due to cancelling each other out.
Then, when they reach the true zero line threshold, moving at the speed of infinity, they simply disappear as if they never existed at all.
The only things that can go faster than light... appear to us to not actually exist. (nice positing something that they don’t have to actually be able to prove)