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Showing 1–15 of 15 results
Advanced filters: Author: Wolfgang Tittel Clear advanced filters

  • When two spatially separated parties flip a coin, it is impossible to choose between two alternatives in an unbiased manner. This study presents a quantum coin-flipping protocol that overcomes this problem and ensures a dishonest party cannot bias the outcome completely.

    • Guido Berlín
    • Gilles Brassard
    • Wolfgang Tittel
    ResearchOpen Access
    Nature Communications
    Volume: 2, P: 1-7

  • The reversible transfer of quantum states of light into and out of matter constitutes an important building block for future applications of quantum communication. Here, the reversible transfer of photon–photon entanglement into entanglement between a photon and a collective atomic excitation in a solid-state device is reported. This should simplify frequency-matching of light with matter interfaces in advanced applications of quantum communication, bringing fully quantum-enabled networks a step closer.

    • Erhan Saglamyurek
    • Neil Sinclair
    • Wolfgang Tittel
    Research
    Nature
    Volume: 469, P: 512-515

  • The first field test of quantum teleportation is implemented across a metropolitan fibre network with independent quantum light sources. To establish a robust quantum teleportation system in the real world, several feedback mechanisms are developed.

    • Raju Valivarthi
    • Marcel.li Grimau Puigibert
    • Wolfgang Tittel
    Research
    Nature Photonics
    Volume: 10, P: 676-680

  • The 'no-cloning' theorem of quantum mechanics forbids the perfect copying of properties of photons or electrons. But quantum teleportation allows their flawless transfer — now even for two properties simultaneously. See Letter p.516

    • Wolfgang Tittel
    News & Views
    Nature
    Volume: 518, P: 491-492

  • Scalable networks for processing and distribution of quantum information using photons can be achieved by using multiplexed quantum states. Here, the authors report frequency-multimode storage and spectral-temporal photon manipulation of heralded single photons at telecom wavelength, in a fully integrated setting.

    • Erhan Saglamyurek
    • Marcelli Grimau Puigibert
    • Wolfgang Tittel
    ResearchOpen Access
    Nature Communications
    Volume: 7, P: 1-7

  • The race of distributing provable-secure encryption keys by means of quantum key distribution over ever-increasing distances is on. A surprising development has now led to a new result that may affect how we build future quantum networks.

    • Wolfgang Tittel
    News & Views
    Nature Photonics
    Volume: 13, P: 310-311

  • Quantum memory is important for a range of application including quantum information processing, matching various processes within a quantum devices, as a tool to convert photons to photons-on-demand and for implementation of long-distance quantum communication using quantum repeaters. Here, state-of-the-art optical quantum memory is reviewed.

    • Alexander I. Lvovsky
    • Barry C. Sanders
    • Wolfgang Tittel
    Reviews
    Nature Photonics
    Volume: 3, P: 706-714

  • Quantum key distribution (QKD) for information-theoretic secure distribution of cryptographic keys is one of the best known applications that will be enabled by the Quantum Internet. Here, the authors deploy the protocol of measurement-device-independent quantum key distribution into a realistic network environment, testing its field performances and showing the co-existing of this QKD protocol and the classical network infrastructure.

    • Remon C. Berrevoets
    • Thomas Middelburg
    • Joshua A. Slater
    ResearchOpen Access
    Communications Physics
    Volume: 5, P: 1-8

  • A recently published patent (https://www.ipo.gov.uk/p-ipsum/Case/PublicationNumber/GB2590064) has claimed the development of a novel quantum key distribution protocol purporting to achieve long-range quantum security without trusted nodes and without use of quantum repeaters. Here we present a straightforward analysis of this claim, and reach the conclusion that it is largely unfounded.

    • Bruno Huttner
    • Romain Alléaume
    • Hugo Zbinden
    Comments & OpinionOpen Access
    npj Quantum Information
    Volume: 8, P: 1-5