刻画失谐消失量子信道的算子和表示

Characterizing Operator Sum Representation of Discord Annihilating Quantum Channels

获得了失谐消失量子信道的算子和表示,进一步证明了信道Φ是失谐消失信道的充分必要条件是极大纠缠态在ΦI_d下的像的量子失谐为零。

In the note, we give a characterization of operator sum representation of discord an- nihilating channels. Furthermore, we prove that a quantum channel Φ is discord-annihilating if and only if ΦI×d maps the maximum entangled state to a state with zero discord.