Witnessing quantum capacities of correlated channels
arXiv:1611.02857 · doi:10.1103/PhysRevA.94.052333
Abstract
We test a general method to detect lower bounds of the quantum channel capacity for two-qubit correlated channels. We consider in particular correlated dephasing, depolarising and amplitude damping channels. We show that the method is easily implementable, it does not require a priori knowledge about the channels, and it is very efficient, since it does not rely on full quantum process tomography.
arXiv comment9 pages, 3 figures
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