A simple scheme to entangle distant qubits from a mixed state via an entanglement mediator

    Research output: Contribution to journalArticle

    12 Citations (Scopus)

    Abstract

    A simple scheme to prepare an entanglement between two separated qubits from a given mixed state is proposed. A single qubit (entanglement mediator) is repeatedly made to interact locally and consecutively with the two qubits through rotating-wave couplings and is then measured. It is shown that we need to repeat this kind of process only three times to establish a maximally entangled state directly from an arbitrary initial mixed state, with no need to prepare the state of the qubits in advance or to rearrange the setup step by step. Furthermore, the maximum yield realizable with this scheme is compatible with the maximum entanglement, provided that the coupling constants are properly tuned.

    Original languageEnglish
    Pages (from-to)523-531
    Number of pages9
    JournalProgress of Theoretical Physics
    Volume114
    Issue number3
    Publication statusPublished - 2005 Sep

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    @article{af20516a24ff4f51abe65e095e48bafb,
    title = "A simple scheme to entangle distant qubits from a mixed state via an entanglement mediator",
    abstract = "A simple scheme to prepare an entanglement between two separated qubits from a given mixed state is proposed. A single qubit (entanglement mediator) is repeatedly made to interact locally and consecutively with the two qubits through rotating-wave couplings and is then measured. It is shown that we need to repeat this kind of process only three times to establish a maximally entangled state directly from an arbitrary initial mixed state, with no need to prepare the state of the qubits in advance or to rearrange the setup step by step. Furthermore, the maximum yield realizable with this scheme is compatible with the maximum entanglement, provided that the coupling constants are properly tuned.",
    author = "Kazuya Yuasa and Hiromichi Nakazato",
    year = "2005",
    month = "9",
    language = "English",
    volume = "114",
    pages = "523--531",
    journal = "Progress of Theoretical Physics",
    issn = "0033-068X",
    number = "3",

    }

    TY - JOUR

    T1 - A simple scheme to entangle distant qubits from a mixed state via an entanglement mediator

    AU - Yuasa, Kazuya

    AU - Nakazato, Hiromichi

    PY - 2005/9

    Y1 - 2005/9

    N2 - A simple scheme to prepare an entanglement between two separated qubits from a given mixed state is proposed. A single qubit (entanglement mediator) is repeatedly made to interact locally and consecutively with the two qubits through rotating-wave couplings and is then measured. It is shown that we need to repeat this kind of process only three times to establish a maximally entangled state directly from an arbitrary initial mixed state, with no need to prepare the state of the qubits in advance or to rearrange the setup step by step. Furthermore, the maximum yield realizable with this scheme is compatible with the maximum entanglement, provided that the coupling constants are properly tuned.

    AB - A simple scheme to prepare an entanglement between two separated qubits from a given mixed state is proposed. A single qubit (entanglement mediator) is repeatedly made to interact locally and consecutively with the two qubits through rotating-wave couplings and is then measured. It is shown that we need to repeat this kind of process only three times to establish a maximally entangled state directly from an arbitrary initial mixed state, with no need to prepare the state of the qubits in advance or to rearrange the setup step by step. Furthermore, the maximum yield realizable with this scheme is compatible with the maximum entanglement, provided that the coupling constants are properly tuned.

    UR - http://www.scopus.com/inward/record.url?scp=28844509721&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=28844509721&partnerID=8YFLogxK

    M3 - Article

    VL - 114

    SP - 523

    EP - 531

    JO - Progress of Theoretical Physics

    JF - Progress of Theoretical Physics

    SN - 0033-068X

    IS - 3

    ER -