Tweezers made from laser beams can hold and move a single atom Aepsilon/Shutterstock
The way gravity affects the quantum realm has so far remained mysterious. But an experiment that uses lasers as a pair of tweezers could let researchers assess how Earth鈥檚 gravitational pull affects an atom that ticks like a clock.
At extremely cold temperatures 鈥 think billionths of a degree above absolute zero 鈥 quantum effects make atoms behave like 鈥渕atter waves鈥 rather than particles. Physicists have long taken advantage of this: by colliding…
