摘要
Here in this letter, we study the difference between quantum and classical deletion. We point out that the linear mapping deletion operation used in the impossibility proof for quantum systems applies also to classical system. The general classical deletion operation is a combined operation of measurement and transformation, i.e., first read the state and then transfer the state to the standard blank state. Though both quantum information and classical information can be deleted in an open system, quantum information cannot be recovered while classical information can be recovered.
基金
Supported by the National Natural Science Foundation of China under Grant Nos. 10775076 and 10874098
the National Basic Research Program of China under Grant No. 2006CB921106
the Specialized Research Fund for the Doctoral Program of Education Ministry of China under Grant No. 20060003048
