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Publisher: Bristol : IOP Publ. × Subject: Quantum computing ×

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    Roadmap on quantum nanotechnologies
    (Bristol : IOP Publ., 2021) Laucht, Arne; Hohls, Frank; Ubbelohde, Niels; Fernando Gonzalez-Zalba, M.; Reilly, David J.; Stobbe, Søren; Schröder, Tim; Scarlino, Pasquale; Koski, Jonne V.; Dzurak, Andrew; Yang, Chih-Hwan; Yoneda, Jun; Kuemmeth, Ferdinand; Bluhm, Hendrik; Pla, Jarryd; Hill, Charles; Salfi, Joe; Oiwa, Akira; Muhonen, Juha T.; Verhagen, Ewold; LaHaye, M D; Kim, Hyun Ho; Tsen, Adam W; Culcer, Dimitrie; Geresdi, Attila; Mol, Jan A.; Mohan, Varun; Jain, Prashant K.; Baugh, Jonathan
    Quantum phenomena are typically observable at length and time scales smaller than those of our everyday experience, often involving individual particles or excitations. The past few decades have seen a revolution in the ability to structure matter at the nanoscale, and experiments at the single particle level have become commonplace. This has opened wide new avenues for exploring and harnessing quantum mechanical effects in condensed matter. These quantum phenomena, in turn, have the potential to revolutionize the way we communicate, compute and probe the nanoscale world. Here, we review developments in key areas of quantum research in light of the nanotechnologies that enable them, with a view to what the future holds. Materials and devices with nanoscale features are used for quantum metrology and sensing, as building blocks for quantum computing, and as sources and detectors for quantum communication. They enable explorations of quantum behaviour and unconventional states in nano- and opto-mechanical systems, low-dimensional systems, molecular devices, nano-plasmonics, quantum electrodynamics, scanning tunnelling microscopy, and more. This rapidly expanding intersection of nanotechnology and quantum science/technology is mutually beneficial to both fields, laying claim to some of the most exciting scientific leaps of the last decade, with more on the horizon.
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    Stability of quantum linear logic circuits against perturbations
    (Bristol : IOP Publ., 2020) Babushkin, Ihar; Morgner, Uwe; Demircan, Ayhan
    Here we study transformation of waveshapes of photons under the action of the linear logic circuits and other related architectures involving only linear optical networks and measurements. We show that the gates are working well not only in the case when all photons are separable and located in the same mode, but in some more general cases. For instance, the photonic waveshapes are allowed to be slightly different in different channels; in this case, Zeno effect prevents the photons from decoherence after the measurement, and the gate thus remains neutral to the small waveshape perturbations. © 2020 The Author(s). Published by IOP Publishing Ltd Printed in the UK