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Title: Superconducting quasiparticle-amplifying transmon: A qubit-based sensor for meV-scale phonons and single terahertz photons

Journal Article · · Physical Review Applied

With great interest from the quantum computing community, an immense amount of R&D effort has been invested into improving superconducting qubits. The technologies developed for the design and fabrication of these qubits can be directly applied to applications for ultralow-threshold particle detectors, e.g., low-mass dark matter and far-infrared photon sensing. We propose a novel energy-resolving sensor based on the transmon qubit architecture combined with a signal-enhancing superconducting quasiparticle amplification stage. We refer to these sensors as SQUATs: superconducting quasiparticle-amplifying transmons. We detail the operating principle and design of this new sensor and predict that, with minimal R&D effort, solid-state-based detectors patterned with these sensors can achieve sensitivity to single terahertz photons, and sensitivity to 1 meV phonons in the detector absorber substrate on the microsecond timescale. Published by the American Physical Society 2024

Sponsoring Organization:
USDOE
OSTI ID:
2476064
Journal Information:
Physical Review Applied, Journal Name: Physical Review Applied Journal Issue: 5 Vol. 22; ISSN 2331-7019; ISSN PRAHB2
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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