Characterization of a fabrication process for the integration of superconducting qubits and rapid-single-flux-quantum circuits

Maria Gabriella Castellano, Leif Grönberg, Pasquale Carelli, Fabio Chiarello, Carlo Cosmelli, Roberto Leoni, Stefano Poletto, Guido Torrioli, Juha Hassel, Panu Helistö

    Research output: Contribution to journalArticleScientificpeer-review

    18 Citations (Scopus)

    Abstract

    In order to integrate superconducting qubits with rapid-single-flux-quantum (RSFQ) control circuitry, it is necessary to develop a fabrication process that simultaneously fulfils the requirements of both elements: low critical current density, very low operating temperature (tens of millikelvin) and reduced dissipation on the qubit side; high operation frequency, large stability margins, low dissipated power on the RSFQ side. For this purpose, VTT has developed a fabrication process based on Nb trilayer technology, which allows the on-chip integration of superconducting qubits and RSFQ circuits even at very low temperature. Here we present the characterization (at 4.2 K) of the process from the point of view of the Josephson devices and show that they are suitable to build integrated superconducting qubits.
    Original languageEnglish
    Pages (from-to)860-864
    Number of pages5
    JournalSuperconductor Science and Technology
    Volume19
    DOIs
    Publication statusPublished - 2006
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Fluxes
    Fabrication
    fabrication
    Networks (circuits)
    operating temperature
    margins
    critical current
    dissipation
    chips
    current density
    Temperature
    requirements

    Keywords

    • qubits
    • Josephson junction
    • superconducting junction devices

    Cite this

    Castellano, Maria Gabriella ; Grönberg, Leif ; Pasquale Carelli ; Chiarello, Fabio ; Cosmelli, Carlo ; Leoni, Roberto ; Poletto, Stefano ; Torrioli, Guido ; Hassel, Juha ; Helistö, Panu. / Characterization of a fabrication process for the integration of superconducting qubits and rapid-single-flux-quantum circuits. In: Superconductor Science and Technology. 2006 ; Vol. 19. pp. 860-864.
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    title = "Characterization of a fabrication process for the integration of superconducting qubits and rapid-single-flux-quantum circuits",
    abstract = "In order to integrate superconducting qubits with rapid-single-flux-quantum (RSFQ) control circuitry, it is necessary to develop a fabrication process that simultaneously fulfils the requirements of both elements: low critical current density, very low operating temperature (tens of millikelvin) and reduced dissipation on the qubit side; high operation frequency, large stability margins, low dissipated power on the RSFQ side. For this purpose, VTT has developed a fabrication process based on Nb trilayer technology, which allows the on-chip integration of superconducting qubits and RSFQ circuits even at very low temperature. Here we present the characterization (at 4.2 K) of the process from the point of view of the Josephson devices and show that they are suitable to build integrated superconducting qubits.",
    keywords = "qubits, Josephson junction, superconducting junction devices",
    author = "Castellano, {Maria Gabriella} and Leif Gr{\"o}nberg and {Pasquale Carelli} and Fabio Chiarello and Carlo Cosmelli and Roberto Leoni and Stefano Poletto and Guido Torrioli and Juha Hassel and Panu Helist{\"o}",
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    Characterization of a fabrication process for the integration of superconducting qubits and rapid-single-flux-quantum circuits. / Castellano, Maria Gabriella; Grönberg, Leif; Pasquale Carelli; Chiarello, Fabio; Cosmelli, Carlo; Leoni, Roberto; Poletto, Stefano; Torrioli, Guido; Hassel, Juha; Helistö, Panu.

    In: Superconductor Science and Technology, Vol. 19, 2006, p. 860-864.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Characterization of a fabrication process for the integration of superconducting qubits and rapid-single-flux-quantum circuits

    AU - Castellano, Maria Gabriella

    AU - Grönberg, Leif

    AU - Pasquale Carelli, null

    AU - Chiarello, Fabio

    AU - Cosmelli, Carlo

    AU - Leoni, Roberto

    AU - Poletto, Stefano

    AU - Torrioli, Guido

    AU - Hassel, Juha

    AU - Helistö, Panu

    PY - 2006

    Y1 - 2006

    N2 - In order to integrate superconducting qubits with rapid-single-flux-quantum (RSFQ) control circuitry, it is necessary to develop a fabrication process that simultaneously fulfils the requirements of both elements: low critical current density, very low operating temperature (tens of millikelvin) and reduced dissipation on the qubit side; high operation frequency, large stability margins, low dissipated power on the RSFQ side. For this purpose, VTT has developed a fabrication process based on Nb trilayer technology, which allows the on-chip integration of superconducting qubits and RSFQ circuits even at very low temperature. Here we present the characterization (at 4.2 K) of the process from the point of view of the Josephson devices and show that they are suitable to build integrated superconducting qubits.

    AB - In order to integrate superconducting qubits with rapid-single-flux-quantum (RSFQ) control circuitry, it is necessary to develop a fabrication process that simultaneously fulfils the requirements of both elements: low critical current density, very low operating temperature (tens of millikelvin) and reduced dissipation on the qubit side; high operation frequency, large stability margins, low dissipated power on the RSFQ side. For this purpose, VTT has developed a fabrication process based on Nb trilayer technology, which allows the on-chip integration of superconducting qubits and RSFQ circuits even at very low temperature. Here we present the characterization (at 4.2 K) of the process from the point of view of the Josephson devices and show that they are suitable to build integrated superconducting qubits.

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    KW - Josephson junction

    KW - superconducting junction devices

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    DO - 10.1088/0953-2048/19/8/030

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    JO - Superconductor Science and Technology

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