Erase entangled memory to cool a computer

 作者:印妓盈     |      日期:2019-03-07 02:01:07
By Anil Ananthaswamy IMAGINE cooling a supercomputer not with fans or freezers, but by deleting some of its memory. This might be possible, provided some of the bits that make up the computer’s memory are “entangled” – a strange property that can link two quantum systems, no matter how far apart they sit in physical space. The notion of cooling by erasure seemingly violates a principle articulated by physicist Rolf Landauer in 1961. He showed that erasing information is akin to a decrease in entropy or disorder. As entropy overall must always increase,