Comment on 'quantum dialogue'

Abstract

In this comment, we want to emphasize that when the state of the two qubit is $|0{>}_B|1{>}_A$ or $|1{>}_A|0{>}_B$, Bob's Bell basis measurement outcome can not be $|{\varphi }^{\pm }>$. Also, when the product state is $|0>|0>$ or $|1>|1>$, Bob's measurement outcome can not be $|{\psi }^{\pm }>$.

PACS:03.67.Hk