The device could help hunt dark matter or search for gravitational waves, scientists say.
is an example of a space-based experiment, which tested the technology in orbit for two years.
If they shone the laser on only a single clock, the laser excited electrons in the same number of atoms for only one-tenth of a second. But with two clocks at the same time, the atoms stayed excited for 26 seconds. "Normally, our laser would limit the performance of these clocks," Kolkowitz said."But because the clocks are in the same environment and experience the exact same laser light, the effect of the laser drops out completely."
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