Quantum catalysis of information

Azuma, Koji; Koashi, Masato; Imoto, Nobuyuki

Quantum catalysis of information

Authors

Azuma, Koji

Koashi, Masato

Imoto, Nobuyuki

Description

Heisenberg's uncertainty principle and recently derived many no-go theorems including the no-cloning theorem and the no-deleting theorem have corroborated the idea that we can never access quantum information without causing disturbance. Here we disprove this presumption by predicting a novel phenomenon, `quantum catalysis of information,' where a system enables an otherwise impossible task by exchanging information through a quantum communication channel. This fact implies that making use of quantum information does not always cause disturbance.
5 pages, 2 figures