集体去极化玻色子通道的无消相干子空间和子系统
Decoherence-free subspaces and subsystems for a collectively depolarizing bosonic channel
摘要：
讨论了集体去极化作用下玻色子通道中无退相干子系统的结构。信道的单次使用被定义为一对玻色子模式的传输。集体去极化包括各个模式算子的随机线性U（2）变换，其被假设为对于信道的$N$连续使用是相同的。我们推导出一个递归公式，在这样的设置可用的消相干子系统的维数的特征。
英文摘要：
We discuss the structure of decoherence-free subsystems for a bosonic channel affected by collective depolarization. A single use of the channel is defined as a transmission of a pair of bosonic modes. Collective depolarization consists in a random linear U(2) transformation of the respective mode operators, which is assumed to be identical for $N$ consecutive uses of the channel. We derive a recursion formula that characterizes the dimensionality of available decoherence-free subsystems in such a setting.
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