论文标题
谐振多级振幅阻尼通道
Resonant Multilevel Amplitude Damping Channels
论文作者
论文摘要
我们引入了一组新的量子通道：谐振多级振幅阻尼（remad）通道。除其他实例外，它们可以描述与零温度玻色子环境相互作用引起的多级原子系统中的能量耗散效应。与已知的多级振幅阻尼（MAD）通道的不同类别的不同，这一新的地图允许存在无法区分相同能量差距的过渡的环境。在表征其组成规则的代数之后，通过分析QUTRIT情况，我们表明，这组新的通道可以在允许的参数空间的巨大区域中表现出可降解性和抗降解性。我们在那里计算其量子能力和私人经典能力。我们表明，这些能力也可以在通道无法降解或抗抑郁的参数空间区域中精确计算。
We introduce a new set of quantum channels: resonant multilevel amplitude damping (ReMAD) channels. Among other instances, they can describe energy dissipation effects in multilevel atomic systems induced by the interaction with a zero-temperature bosonic environment. At variance with the already known class of multilevel amplitude damping (MAD) channels, this new class of maps allows the presence of an environment unable to discriminate transitions with identical energy gaps. After characterizing the algebra of their composition rules, by analyzing the qutrit case, we show that this new set of channels can exhibit degradability and antidegradability in vast regions of the allowed parameter space. There we compute their quantum capacity and private classical capacity. We show that these capacities can be computed exactly also in regions of the parameter space where the channels aren't degradable nor antidegradable.
