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Matter waves are not so different from string waves.

By studying such details, the researchers could tell whether, prior to crashing, the matter waves had been changed by interacting with light or any other forces in their surroundings.

Onboard the MAIUS-1 rocket, a carefully choreographed system of lasers split the ultracold atoms into multiple matter waves before letting them collide.

The stripe pattern produced by colliding BECs, Gaaloul says, is a bit like an archeological dig: it helps scientists determine the precise precrash history of the matter waves and pinpoint anything that could have moved their peaks and troughs.

Earth-orbiting BECs could also advance atom interferometry — a measurement technique based on the interference between matter waves.