Novel supramolecular polymers have been prepared from a β-cyclodextrin dimer and a ditopic guest dimer having adamantyl groups. β-Cyclodextrins were bound to poly(ethylene glycol) (PEG, M n 600). Adamantyl groups were also bound to PEG (M n 600). The ROESY NMR spectrum of a 1:1 mixture of the β-cyclodextrin dimer and the ditopic adamantane guest dimer showed ROE correlations between the protons of adamantyl substituents and the inner protons of β-cyclodextrin. Molecular weights and molecular sizes of the supramolecular polymer constructed by the mixture of the β-cyclodextrin dimer and the ditopic adamantane guest dimer were investigated by the pulse field gradient spin echo (PFGSE) NMR and by vapor pressure osmometry (VPO). The results have shown that the mixture of the β-cyclodextrin host dimer and the adamantane guest dimer gave linear supramolecular polymers with high molecular weight (M n = 100 000).

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An all-optical network is identified as a promising infrastructure for fast and energy-efficient communication. Recently, it has been shown that its quantum version based on ‘all-photonic quantum repeaters’—inheriting, at least, the same advantages—expands its possibility to the quantum realm, that is, a global quantum internet with applications far beyond the conventional Internet. Here we report a proof-of-principle experiment for a key component for the all-photonic repeaters—called all-photonic time-reversed adaptive (TRA) Bell measurement, with a proposal for the implementation. In particular, our TRA measurement—based only on optical devices without any quantum memories and any quantum error correction—passively but selectively performs the Bell measurement only on single photons that have successfully survived their lossy travel over optical channels. In fact, our experiment shows that only the survived single-photon state is faithfully teleported without the disturbance from the other lost photons, as the theory predicts.

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