论文标题
在存在相关噪声的情况下，量子通道容量的实验见证
Experimental witnessing of the quantum channel capacity in the presence of correlated noise
论文作者
论文摘要
我们提出了一种实验方法，可以检测到两量价通信通道的量子能力的下限。我们考虑具有两个光子的极化自由度的实现，并报告了这种方法在存在相关噪声的情况下的相关强度值的效率。该过程基于两个量子位的可分离状态和输出处的局部测量。我们还将相关的两数Qubit通道的性能与对应于每个子系统的部分轨迹的单量子通道的性能进行了比较，从而显示出正确考虑相关性以实现更大量子能力的有益效果。
We present an experimental method to detect lower bounds to the quantum capacity of two-qubit communication channels. We consider an implementation with polarisation degrees of freedom of two photons and report on the efficiency of such a method in the presence of correlated noise for varying values of the correlation strength. The procedure is based on the generation of separable states of two qubits and local measurements at the output. We also compare the performance of the correlated two-qubit channel with the single-qubit channels corresponding to the partial trace on each of the subsystems, thus showing the beneficial effect of properly taking into account correlations to achieve a larger quantum capacity.
