(英) |
We discuss quantum reservoir computing with a multimode interferometric optical circuit. Multiparticle quantum interferences give rise to nontirivial input-output relations of an optical circuit, and even a simple interferometric circuit can serve as a reservoir for reservoir computing. We focus on two-mode Gaussian states of light, and estimate several quantities characterizing the states, such as the logarithmic negativity, the strength of the correlation, the mean photon number, the standard deviation in the photon number, the von Neumann entropy, and the purity. We clarify the relevance of the multiparticle interferences in this reservoir computing, and show the robustness of the scheme against imperfect efficiencies of the detectors, against photon losses, and against dephasing. |