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Ultracold matter

Ultracold matter

Space-borne atoms herald new tests of Einstein’s equivalence principle

08 Mar 2024 Ali Lezeik 
Photo of the International Space Station in orbit around the Earth, with a falling apple and orange superimposed on top of it
Free falling: Einstein's equivalence principle holds that the motion of freely-falling bodies (whether apples, oranges, or anything else) is independent of their composition. The Cold Atom Laboratory aboard the International Space Station aims to test this principle using ultracold atoms with different masses. (Courtesy: Ali Lezeik, adapting original image from Roskosmos/NASA)
The motion of freely-falling bodies is independent of their composition. This is one of the foundati

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Ali Lezeik is a PhD student contributor to Physics World. Ali is currently working on quantum optics at the Leibniz University Hannover. Find out more about our student contributor networks
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