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Showing 1–11 of 11 results
Advanced filters: Author: Jonas S. Neergaard-Nielsen Clear advanced filters

  • Scientists experimentally demonstrate a scheme that allows the number of qubits encoded per photon to be varied while keeping the overall quantum information constant. They also propose the inverse 'splitting' process.

    • Jonas Schou Neergaard-Nielsen
    News & Views
    Nature Photonics
    Volume: 7, P: 512-513

  • A quantum ‘tele-amplification’ scheme that combines teleportation and the noiseless amplification of a coherent state is demonstrated by using Schrödinger-cat states prepared by photon subtraction from squeezed vacuum as an entanglement resource. This scheme can realize high-capacity communication, thus beating the homodyne limit of optical communications.

    • Jonas S. Neergaard-Nielsen
    • Yujiro Eto
    • Masahide Sasaki
    Research
    Nature Photonics
    Volume: 7, P: 439-443

  • Distillation of entangled photons is essential for applications such as long-distance quantum communication and high-fidelity quantum teleportation. Distillation from Gaussian input states is experimentally realized, resulting in a large gain in entanglement.

    • Hiroki Takahashi
    • Jonas S. Neergaard-Nielsen
    • Masahide Sasaki
    Research
    Nature Photonics
    Volume: 4, P: 178-181

  • Measurement-based quantum computing performs quantum gates on entangled states without difficult multi-qubit coherent dynamics. A set of gates sufficient for universal quantum computing has now been implemented on a programmable optical platform.

    • Mikkel V. Larsen
    • Xueshi Guo
    • Ulrik L. Andersen
    Research
    Nature Physics
    Volume: 17, P: 1018-1023

  • A proof-of-principle study reports a complete photonic quantum computer architecture that can, once appropriate component performance is achieved, deliver a universal and fault-tolerant quantum computer.

    • H. Aghaee Rad
    • T. Ainsworth
    • Y. Zhang
    ResearchOpen Access
    Nature
    Volume: 638, P: 912-919

  • Experiments demonstrate quantum phase sensing with a four-mode entangled state, reaching a measurement precision that is beyond what can be achieved by separate individual probes.

    • Xueshi Guo
    • Casper R. Breum
    • Ulrik L. Andersen
    Research
    Nature Physics
    Volume: 16, P: 281-284

  • The traditional approaches to quantum information processing using either discrete or continuous variables can be combined in hybrid protocols for tasks including quantum teleportation, computation, entanglement distillation or Bell tests.

    • Ulrik L. Andersen
    • Jonas S. Neergaard-Nielsen
    • Akira Furusawa
    Reviews
    Nature Physics
    Volume: 11, P: 713-719

  • Quantum key distribution allows ultimate security based on laws of physics, and its integration on the existing optical network is of worldwide interest. Exploiting the concept of space division multiplexing in a 37-cores multicore fibre, this work demonstrates efficient secret key generation and high compatibility with classical communication.

    • Davide Bacco
    • Beatrice Da Lio
    • Leif K. Oxenløwe
    ResearchOpen Access
    Communications Physics
    Volume: 2, P: 1-8