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Information transmission in bosonic memory channels using Gaussian matrix-product states as near-optimal symbols

par Schafer, Joachim ;Karpov, Evgueni ;Cerf, Nicolas
Référence AIP Conference Proceedings, 1633, page (192-194)
Publication Publié, 2014

Article révisé par les pairs

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Résumé :

We seek for a realistic implementation of multimode Gaussian entangled states that can realize the optimal encoding for quantum bosonic Gaussian channels with memory. For a Gaussian channel with classical additive Markovian correlated noise and a lossy channel with non-Markovian correlated noise, we demonstrate the usefulness using Gaussian matrix-product states (GMPS). These states can be generated sequentially, and may, in principle, approximate well any Gaussian state. We show that we can achieve up to 99.9% of the classical Gaussian capacity with GMPS requiring squeezing parameters that are reachable with current technology. This may offer a way towards an experimental realization.