Narrow-band microwave radiation from a biased single-Cooper-pair transistor.

PAPER pubmed Physical review letters 2007 Engineering / measurement Effect: harm Evidence: Low

Read original paper → DOI: 10.1103/physrevlett.98.227001 PMID: 17677871 Evidence Lab

Abstract

We show that a single-Cooper-pair transistor (SCPT) electrometer emits narrow-band microwave radiation when biased in its subgap region. Photoexcitation of quasiparticle tunneling in a nearby SCPT is used to spectroscopically detect this radiation in a configuration that closely mimics a qubit-electrometer integrated circuit. We identify emission lines due to Josephson radiation and radiative transport processes in the electrometer and argue that a dissipative superconducting electrometer can severely disrupt the system it attempts to measure.

AI evidence extraction

At a glance

Study type

Engineering / measurement

Effect direction

harm

Population

—

Sample size

—

Exposure

microwave single-Cooper-pair transistor (SCPT) electrometer emission

Evidence strength

Low

Confidence: 74% · Peer-reviewed: yes

Main findings

A single-Cooper-pair transistor electrometer emitted narrow-band microwave radiation when biased in the subgap region, detected spectroscopically using photoexcitation of quasiparticle tunneling in a nearby SCPT. Emission lines were attributed to Josephson radiation and radiative transport processes, and the authors argue such an electrometer can disrupt the system it measures.

Outcomes measured

narrow-band microwave radiation emission
spectroscopic detection via photoexcitation of quasiparticle tunneling
identification of emission lines (Josephson radiation; radiative transport processes)
potential disruption of nearby superconducting/qubit-like circuits by dissipative electrometer

Limitations

No frequencies or power levels of the emitted radiation are provided in the abstract.
No biological/health outcomes are studied; results pertain to superconducting circuit interference/disruption.
Sample size and experimental replication details are not stated in the abstract.

View raw extracted JSON

{
    "study_type": "engineering",
    "exposure": {
        "band": "microwave",
        "source": "single-Cooper-pair transistor (SCPT) electrometer emission",
        "frequency_mhz": null,
        "sar_wkg": null,
        "duration": null
    },
    "population": null,
    "sample_size": null,
    "outcomes": [
        "narrow-band microwave radiation emission",
        "spectroscopic detection via photoexcitation of quasiparticle tunneling",
        "identification of emission lines (Josephson radiation; radiative transport processes)",
        "potential disruption of nearby superconducting/qubit-like circuits by dissipative electrometer"
    ],
    "main_findings": "A single-Cooper-pair transistor electrometer emitted narrow-band microwave radiation when biased in the subgap region, detected spectroscopically using photoexcitation of quasiparticle tunneling in a nearby SCPT. Emission lines were attributed to Josephson radiation and radiative transport processes, and the authors argue such an electrometer can disrupt the system it measures.",
    "effect_direction": "harm",
    "limitations": [
        "No frequencies or power levels of the emitted radiation are provided in the abstract.",
        "No biological/health outcomes are studied; results pertain to superconducting circuit interference/disruption.",
        "Sample size and experimental replication details are not stated in the abstract."
    ],
    "evidence_strength": "low",
    "confidence": 0.7399999999999999911182158029987476766109466552734375,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "microwave radiation",
        "narrow-band emission",
        "single-Cooper-pair transistor",
        "SCPT electrometer",
        "Josephson radiation",
        "quasiparticle tunneling",
        "spectroscopy",
        "superconducting circuits",
        "qubit-electrometer integrated circuit"
    ],
    "suggested_hubs": []
}

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AI-extracted fields are generated from the abstract/metadata and may be incomplete or incorrect. This content is for informational purposes only and is not medical advice.

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