Hundreds of thousands of lithium atoms cooled to near absolute zero exhibit a strange quantum effect a bit like a boomerang
inside a small vacuum-sealed box. They used lasers to arrange the lithium atoms in a line and keep them in a particular quantum state that they hoped would reveal the boomerang effect.
The researchers then used the laser to nudge the atoms. This resulted in them going from having zero average momentum to having a positive average momentum. If the same change happened to a ball it would roll away, but due to the quantum boomerang effect, the team found that the atoms’ average momentum soon returned to zero.
He says that the next goal is to determine if boomeranging happens when super cold atoms interact with each other very intensely. Behaviour of such very coordinated atoms is not well understood, so seeing them boomerang could uncover something new about quantum physics.
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