Physics
Light has been seen leaving an atom cloud before it entered
Particles of light can spend "negative time" passing through a cloud of extremely cold atoms – without breaking the laws of physics
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Particles of light can spend "negative time" passing through a cloud of extremely cold atoms – without breaking the laws of physics
Condensed matter is a huge field of physics that gets less attention than it deserves. We must show people its subtle magic if we are to draw in a diverse set of researchers for the next generation, says Felix Flicker