Summary form only given. Quantum mechanics offers the information scientist a new rich resource, which is only recently being tapped to allow for secure communication in the form of quantum cryptography, and for tremendous parallelism in quantum information processing and computing. I will describe developments and prospects for each. Quantum cryptography has already advanced beyond the research laboratory to become a realizable technology with proven secret key distribution for encryption. Quantum computing, although at an earlier stage of development has been recognized as a major new development in physics, enables us (if a quantum computer is realizable) to attack problems previously thought to be too complex for normal computation in a reasonable time. Examples of quantum algorithms involving this kind of advantage are Shor's for fast factorization (in itself a threat to secure communication) and Grover's for database searching. I will discuss the ways quantum mechanics allow such a speed-up, stressing how quantum entanglement is the key resource being exploited, and how quantum gates, networks, and the processors may be implemented in a realistically noisy environment. Simple demonstrators have already been built, and I will discuss prospects for future realization of large-scale processors.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Quantum communication and quantum computing


    Contributors:


    Publication date :

    1999-01-01


    Size :

    119268 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Quantum computing

    Rietsche, Roman / Dremel, Christian / Bosch, Samuel et al. | Online Contents | 2022

    Free access


    Using quantum computing algorithms in future satellite communication

    Bacsardi, L. / International Astronautical Federation / International Academy of Astronautics et al. | British Library Conference Proceedings | 2005



    Quantum Computing Solid Circuits

    Matsueda, H. | IEEE | 1997