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How to cook up 'foamy' space-time in the lab

作者:融牲鲩    发布时间:2019-03-07 09:05:01    

CAN the way the universe behaves at the tiniest scales be recreated in the lab? Physicist Igor Smolyaninov of the University of Maryland in College Park has a recipe for cooking up a lab-scale version of a “quantum foam”, the choppy substance that constitutes space-time in some theories of quantum gravity. According to these theories, space-time may appear smooth and curved, but zoom in and it is actually made of virtual black holes, each just 10-35 metres wide, which flit in and out of existence. To mimic this structure, Smolyaninov suggests exploiting “critical opalescence”. At certain temperatures,

 

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