Erase entangled memory to cool a computer - tech - 06 June 2011 - New Scientist

Erase entangled memory to cool a computer: Now imagine that the memory bits to be erased are entangled with other objects. In such a system, observing or determining the state of one part immediately fixes the state of the other. So an observer who has access to the entangled objects could know even more about the memory than would be possible otherwise, causing the conditional entropy of the system to dip and become negative when the memory is erased.