The Experts below are selected from a list of 283314 Experts worldwide ranked by ideXlab platform

Gerhard Rempe - One of the best experts on this subject based on the ideXlab platform.

  • A quantum Network Node with crossed optical fibre cavities
    Nature Physics, 2020
    Co-Authors: Manuel Brekenfeld, Dominik Niemietz, Joseph Dale Christesen, Gerhard Rempe
    Abstract:

    Quantum Networks provide unique possibilities for resolving open questions on entanglement^ 1 and promise innovative applications ranging from secure communication to scalable computation^ 2 . Although two quantum Nodes coupled by a single channel are adequate for basic quantum communication tasks between two parties^ 3 , fully functional large-scale quantum Networks require a web-like architecture with multiply connected Nodes^ 4 . Efficient interfaces between Network Nodes and channels can be implemented with optical cavities^ 5 . Using two optical fibre cavities coupled to one atom, we here realize a quantum Network Node that connects to two quantum channels, one provided by each cavity. It functions as a passive, heralded and high-fidelity quantum memory that requires neither amplitude- and phase-critical control fields^ 6 – 8 nor error-prone feedback loops^ 9 . Our Node is robust, fits naturally into larger fibre-based Networks and has prospects for extensions including qubit-controlled quantum switches^ 10 , 11 , routers^ 12 , 13 and repeaters^ 14 , 15 . A passive, heralded and high-fidelity quantum memory Network Node has been realized, which connects simultaneously to two quantum channels provided by orthogonally aligned optical fibre cavities coupled with a single atom.

Tilman Wolf - One of the best experts on this subject based on the ideXlab platform.

  • a scalable high performance active Network Node
    IEEE Network, 1999
    Co-Authors: Dan Decasper, Bernhard Plattner, Guru Parulkar, Sumi Choi, John Dehart, Tilman Wolf
    Abstract:

    Active Networking in environments built to support link rates up to several gigabits per second poses many challenges. One such challenge is that the memory bandwidth and individual processing power of the router's microprocessors limit the total available processing power of a router. In this article we identify and describe three components, which promise a high-performance active Network solution. This implements the key features typical to active Networking, such as automatic protocol deployment and application specific processing, and it is suitable for a gigabit environment. First, we describe the hardware of the active Network Node (ANN), a scalable high-performance platform based on off-the-shelf CPUs connected to a gigabit ATM switch backplane. Second, we introduce the ANN's modular, extensible, and highly efficient operating system (NodeOS). Third, we describe an execution environment running on top of the NodeOS, which implements a novel large-scale active Networking architecture called distributed code caching.

Manuel Brekenfeld - One of the best experts on this subject based on the ideXlab platform.

  • A quantum Network Node with crossed optical fibre cavities
    Nature Physics, 2020
    Co-Authors: Manuel Brekenfeld, Dominik Niemietz, Joseph Dale Christesen, Gerhard Rempe
    Abstract:

    Quantum Networks provide unique possibilities for resolving open questions on entanglement^ 1 and promise innovative applications ranging from secure communication to scalable computation^ 2 . Although two quantum Nodes coupled by a single channel are adequate for basic quantum communication tasks between two parties^ 3 , fully functional large-scale quantum Networks require a web-like architecture with multiply connected Nodes^ 4 . Efficient interfaces between Network Nodes and channels can be implemented with optical cavities^ 5 . Using two optical fibre cavities coupled to one atom, we here realize a quantum Network Node that connects to two quantum channels, one provided by each cavity. It functions as a passive, heralded and high-fidelity quantum memory that requires neither amplitude- and phase-critical control fields^ 6 – 8 nor error-prone feedback loops^ 9 . Our Node is robust, fits naturally into larger fibre-based Networks and has prospects for extensions including qubit-controlled quantum switches^ 10 , 11 , routers^ 12 , 13 and repeaters^ 14 , 15 . A passive, heralded and high-fidelity quantum memory Network Node has been realized, which connects simultaneously to two quantum channels provided by orthogonally aligned optical fibre cavities coupled with a single atom.

Johannes Borregaard - One of the best experts on this subject based on the ideXlab platform.

  • nanophotonic quantum Network Node with neutral atoms and an integrated telecom interface
    New Journal of Physics, 2020
    Co-Authors: Shankar G Menon, Kevin Singh, Johannes Borregaard, Hannes Bernien
    Abstract:

    The realization of a long-distance, distributed quantum Network based on quantum memory Nodes that are linked by photonic channels remains an outstanding challenge. We propose a quantum Network Node based on neutral alkali atoms coupled to nanophotonic crystal cavities that combines a long-lived memory qubit with a photonic interface at the telecom range, thereby enabling the long-distance distribution of entanglement over low loss optical fibers. We present a novel protocol for the generation of an atom-photon entangled state which uses telecom transitions between excited states of the alkali atoms. We analyze the realistic implementation of this protocol using rubidium and cesium atoms taking into account the full atomic level structure and properties of the nanophotonic crystal cavity. We find that a high fidelity entangled state can be generated with current technologies.

Piero Gambini - One of the best experts on this subject based on the ideXlab platform.

  • Transparent optical packet switching: Network architecture and demonstrators in the KEOPS project
    IEEE Journal on Selected Areas in Communications, 1998
    Co-Authors: Piero Gambini, B Bostica, Giovanni Corazza, Franco Callegati, Monique Renaud, Christian Guillemot, Ivan Andonovic, S.l. Danielsen, Philippe Gravey
    Abstract:

    This paper reviews the work carried out in the ACTS KEOPS (Keys to Optical Packet Switching) project, describing the results obtained to date. The main objective of the project is the definition, development, and assessment of optical packet switching and routing Networks, capable of providing transparency to the payload bit rate, using optical packets of fixed duration and low bit rate headers in order to enable easier processing at the Network/Node interfaces. The feasibility of the KEOPS concept is assessed by modeling, laboratory experiments, and testbed implementation of optical packet switching Nodes and Network/Node interfacing blocks, including a fully equipped demonstrator. The demonstration relies on advanced optoelectronic components, developed within the project, which are described