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Sabin's team has shown that, in theory, a gravitational wave would create noticeable vibrations in a Bose-Einstein condensate, a collection of atoms cooled down to almost absolute zero. At this temperature, the atoms behave as one quantum object, and fluctuations can generate "particles" of vibrational energy called phonons.
Bose-Einstein condensates are held in place with traps made of lasers. Previous experiments showed that changing certain properties of the laser trap, such as its size, can create extra phonons in the cloud. Sabin and his colleagues think that gravitational waves should have the same influence (arxiv.org/abs/1402.7009).
"In this case it is space-time that is changing, but that generates a similar effect, which is the creation of phonons," says Sabin. The team calculates that a detector using a Bose-Einstein condensate would be four orders of magnitude more sensitive to gravitational waves than LIGO.
well if the propulsion system generates ripples in space then yes. the other possible signatures (barring something really weird like tachyons) are better detected by other types of detectors like gamma and xray recievers. i don't think neutrinos would be a signature. a mirror domain drive might generate mirror particles that would possibly be detectable by something like this too. but it would likely be a pretty short range detector for mirror particle flux.
Ok I'll bite! So if one has a belief in such things this could be used as an alien spacecraft detector? Assuming aliens use some sort of gravity propulsion or one of the other "phenomena" you mentioned.
yeah. see right now the size for some of these detectors is astounding. best example: a detector for a quantum graviton at a minimum is estimated to require something with the mass and volume of Jupiter. gravity waves detectors like LIGO LISA and so forth are sometimes kilometers long. neutrino detectors are huge tanks of dry cleaning fluid buried underground in mine shafts or huge volumes of ice in the antarctic. gamma ray telescopes are pretty big too. but technological developments like this have the potential to vastly shrink detectors.
Well I'm embarrassed to admit you guys lost me but anything that helps us to understand gravity and quantum physics must be a good thing...right?