Single photon detection of 1.5 THz radiation with the quantum capacitance detector

Echternach, P. M.; Pepper, Brian; Reck, Theodore; Bradford, Charles M.

doi:10.1038/s41550-017-0294-y

Cited by 92 publications

(57 citation statements)

References 17 publications

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“…While the rf-SET has better sensitivity to charge fluctuations [57], the OCS transmon may prove useful for wireless charge sensing with minimal measurement backaction. Furthermore, our work frames the idea of the "quantumcapacitance detector" [58][59][60][61] in the language of cQED and OCS transmons with symmetric superconducting islands, which may have applications for astronomical detectors.…”

Section: Resultsmentioning

confidence: 99%

Direct Dispersive Monitoring of Charge Parity in Offset-Charge-Sensitive Transmons

et al. 2019

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A striking characteristic of superconducting circuits is that their eigenspectra and intermode coupling strengths are well predicted by simple Hamiltonians representing combinations of quantum circuit elements. Of particular interest is the Cooper-pair-box Hamiltonian used to describe the eigenspectra of transmon qubits, which can depend strongly on the offset-charge difference across the Josephson element. Notably, this offset-charge dependence can also be observed in the dispersive coupling between an ancillary readout mode and a transmon fabricated in the offset-charge-sensitive (OCS) regime. We utilize this effect to achieve direct, high-fidelity dispersive readout of the joint plasmon and charge-parity state of an OCS transmon, which enables efficient detection of charge fluctuations and nonequilibrium-quasiparticle dynamics. Specifically, we show that additional highfrequency filtering can extend the charge-parity lifetime of our device by two orders of magnitude, resulting in a significantly improved energy relaxation time T1 ∼ 200 µs. arXiv:1903.00113v2 [cond-mat.mes-hall]

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Section: Resultsmentioning

confidence: 99%

Direct Dispersive Monitoring of Charge Parity in Offset-Charge-Sensitive Transmons

et al. 2019

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“…In an example from this rapidly developing field, the authors of Ref. [71] used a quantum capacitance detector to measure, with high efficiency, single photons from a 5 K blackbody source which has a most probable photon energy of about 2 meV. Similar techniques may point the way to direct detection of low-energy phonons.…”

Section: Resultsmentioning

confidence: 99%

Searching for low mass dark matter via phonon creation in superfluid He4

et al. 2020

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We consider the scattering of dark matter particles from superfluid liquid 4 He, which has been proposed as a target for their direct detection. Focusing on dark matter masses below ∼1 MeV, we demonstrate from sum-rule arguments the importance of the production of single phonons with energies ω ≲ 1 meV. We show further that the anomalous dispersion of phonons in liquid 4 He at low pressures [i.e., d 2 ωðqÞ=dq 2 > 0, where q and ωðqÞ are the phonon momentum and energy] has the important consequence that a single phonon will decay over a relatively short distance into a shower of lower-energy phonons centered on the direction of the original phonon. Thus, the experimental challenge in this regime is to detect a shower of low-energy phonons, not just a single phonon. Additional information from the distribution of phonons in such a shower could enhance the determination of the dark matter mass.

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“…With its demonstrated sensitivity and natural frequencydomain multiplexing, the QCD is promising for future farinfrared space systems. Optical NEPs of below 10 −20 WHz −1/2 at 200 µm have been demonstrated, with the potential for photon counting at far-infrared wavelengths (254) . However, QCDs are some way behind both TES and KIDs arrays in terms of technological maturity.…”

Section: Quantum Capacitance Detectorsmentioning

confidence: 99%

Review: far-infrared instrumentation and technological development for the next decade

Farrah

Smith

Ardila

et al. 2019

J. Astron. Telesc. Instrum. Syst.

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Far-infrared astronomy has advanced rapidly since its inception in the late 1950's, driven by a maturing technology base and an expanding community of researchers. This advancement has shown that observations at far-infrared wavelengths are important in nearly all areas of astrophysics, from the search for habitable planets and the origin of life, to the earliest stages of galaxy assembly in the first few hundred million years of cosmic history. The combination of a still developing portfolio of technologies, particularly in the field of detectors, and a widening ensemble of platforms within which these technologies can be deployed, means that far-infrared astronomy holds the potential for paradigm-shifting advances over the next decade. In this review, we examine current and future far-infrared observing platforms, including ground-based, sub-orbital, and space-based facilities, and discuss the technology development pathways that will enable and enhance these platforms to best address the challenges facing far-infrared astronomy in the 21st century.

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Single photon detection of 1.5 THz radiation with the quantum capacitance detector

Cited by 92 publications

References 17 publications

Direct Dispersive Monitoring of Charge Parity in Offset-Charge-Sensitive Transmons

Direct Dispersive Monitoring of Charge Parity in Offset-Charge-Sensitive Transmons

Searching for low mass dark matter via phonon creation in superfluid He4

Review: far-infrared instrumentation and technological development for the next decade

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