Physicists test the weak equivalence principle in an orbiting space station
Physicists from the Wuhan Institute of Physics and Mathematics have tested the weak equivalence principle using atom interferometry on the China Space Station. The experiment aims to verify if gravity accelerates all objects equally at quantum scales.
Why it matters
Validating this principle in space helps bridge the gap between general relativity and quantum mechanics, potentially revealing new physics.
edited by Sadie Harley , reviewed by Robert Egan
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Add as preferred source Testing the Weak Equivalence Principle using atom interferometry on board the China Space Station. Credit: Dan-Fang Zhang et al. The weak equivalence principle (WEP) is central to Einstein's general relativity. It posits that gravity must accelerate everything equally, regardless of what it is made from. For the first time, a team led by Ming-Sheng Zhan at the Wuhan Institute of Physics and Mathematics has tested the principle using clouds of continuously free-falling atoms aboard an orbiting space station.
Their research has been published in Science Advances .
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