论文标题
具有直接检测的有损光子通道的容量
Capacity of a lossy photon channel with direct detection
论文作者
论文摘要
我们以数值计算有损耗的光子通道的能力，假设在输出处进行光子数分解检测。我们考虑了输入Fock和相干国家合奏的场景，并表明后者的性能总是比前者更差。我们获得离散时间泊松通道的容量，作为Fock状态集合容量的限制行为。我们还表明，在中等数量的光子和低损耗的状态下，通过直接检测，Fock状态集合对于通过正交检测可实现的容量限制而言是有益的。
We calculate numerically the capacity of a lossy photon channel assuming photon number resolving detection at the output. We consider scenarios of input Fock and coherent states ensembles and show that the latter always exhibits worse performance than the former. We obtain capacity of a discrete-time Poisson channel as a limiting behavior of the Fock states ensemble capacity. We show also that in the regime of a moderate number of photons and low losses the Fock states ensemble with direct detection is beneficial with respect to capacity limits achievable with quadrature detection.
