Quantum information: Glass finds its sparkle

Bei Zeng, Xie Chen, Duan-Lu Zhou +1 more

Adam Jagielski, Krzysztof Kanciak

In this paper, we propose an estimation of quantum resources necessary for recovering a key using Known Plain Text Attack (KPA) model for SPARKLE family of LWC authenticated block ciphers - SCHWAEMM. The procedure is based on a general attack using Grover's search algorithm with encryption oracle over key space in superposition. The paper explains step by step how to evaluate the cost of each operation type in encryption oracle in terms of various quantum and reversible gates. The result of this paper is an implementation of the simplified version of this cipher using quantum computer and summary table which shows the depth of quantum circuit, the size of quantum register and how many gates of NCT family are required for implementing the ciphers and attacks on them.

Frederik Pöpsel, Alexander Kassner, Hendrik Heine +3 more

Vlatko Vedral

Matthew R. Henderson, Brant C. Gibson, Heike Ebendorff‐Heidepriem +8 more

Fabrication of a hybrid diamond-glass material is reported, by embedding diamond nanocrystals containing nitrogen-vacancy (NV) color centers into tellurite soft glass. This material allows the fabrication of diamond photonic waveguides using well-established soft glass techniques, such as microstructured optical fiber technology (the figure is a confocal image that shows color center fluorescence in a fiber).