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Measuring the Quantum Capacitance of a Differential Single Cooper-Pair Box

Matthew D. Shaw, Justin F. Schneiderman, Per Delsing +2 more

Bulletin of the American Physical SocietyMar 14, 20060 citations

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

P. M. Echternach, Brian J. Pepper, Theodore Reck +1 more

Nature AstronomyNov 2, 2017102 citations

Correlation-induced suppression of decoherence in capacitively coupled Cooper-pair boxes

Xuedong Hu, J. Q. You, Franco Nori

Bulletin of the American Physical SocietyMar 22, 20050 citations

Proof of concept of the quantum capacitance detector

Juan Bueno, Matthew D. Shaw, Peter K. Day +1 more

We fabricated and tested a proof-of-concept quantum capacitance detector, a superconducting radiation detector described in a recent publication [Shaw et al., Phys. Rev. B 79, 144511 (2009)]. In this concept, quasiparticle tunneling in a single Cooper-pair box is used to measure the density of quasiparticles in a superconducting absorber. We measured and characterized the response of the device to electrical quasiparticle injection obtaining its sensitivity. Moreover, we have converted the sensitivity to electrical noise-equivalent power, which is in the 10−18 W/Hz1/2 range at loading powers between 10−15–10−16 W.We fabricated and tested a proof-of-concept quantum capacitance detector, a superconducting radiation detector described in a recent publication [Shaw et al., Phys. Rev. B 79, 144511 (2009)]. In this concept, quasiparticle tunneling in a single Cooper-pair box is used to measure the density of quasiparticles in a superconducting absorber. We measured and characterized the response of the device to electrical quasiparticle injection obtaining its sensitivity. Moreover, we have converted the sensitivity to electrical noise-equivalent power, which is in the 10−18 W/Hz1/2 range at loading powers between 10−15–10−16 W.

Applied Physics LettersMar 8, 201018 citations

Quantum capacitance detector: A pair-breaking radiation detector based on the single Cooper-pair box

Matthew D. Shaw, Juan Bueno, Peter K. Day +2 more

We present a proposed design for a pair-breaking photodetector for far-infrared and submillimeter radiation. Antenna-coupled radiation generates quasiparticles in a superconducting absorber, the density of which are measured using a single Cooper-pair box. Readout is performed using an electromagnetic oscillator or a microwave resonator, which is well suited for frequency multiplexing in large arrays. Theoretical limits to detector sensitivity are discussed and modeled, with predicted sensitivities on the order of ${10}^{\ensuremath{-}21}\text{ }\text{W}/\sqrt{\text{Hz}}$. We anticipate that this detector can be used to address key scientific goals in far-infrared and submillimeter astronomy.We present a proposed design for a pair-breaking photodetector for far-infrared and submillimeter radiation. Antenna-coupled radiation generates quasiparticles in a superconducting absorber, the density of which are measured using a single Cooper-pair box. Readout is performed using an electromagnetic oscillator or a microwave resonator, which is well suited for frequency multiplexing in large arrays. Theoretical limits to detector sensitivity are discussed and modeled, with predicted sensitivities on the order of ${10}^{\ensuremath{-}21}\text{ }\text{W}/\sqrt{\text{Hz}}$. We anticipate that this detector can be used to address key scientific goals in far-infrared and submillimeter astronomy.

arXiv:0902.4194Physical Review BApr 14, 200933 citations

Large array of low-frequency readout quantum capacitance detectors

P. M. Echternach, Andrew D. Beyer, Charles Mathias Bradford

Quantum capacitance detectors (QCDs) are photon shot noise-limited terahertz detectors based on a single Cooper-pair box superconducting qubit. The QCD has demonstrated photon shot noise-limited performance for 1.5 THz radiation under loading conditions between 10 − 20 and 10 − 18 W and single-photon detection and counting at that frequency. We report here fabrication and preliminary characterization of a 441 pixel array of QCDs with readout frequencies between 700 and 850 MHz.

Journal of Astronomical Telescopes Instruments and SystemsJan 6, 202117 citations

Publisher's Note: Quantum capacitance detector: A pair-breaking radiation detector based on the single Cooper-pair box [Phys. Rev. B79, 144511 (2009)]

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Publisher's Note: Quantum capacitance detector: A pair-breaking radiation detector based on the single Cooper-pair box [Phys. Rev. B79, 144511 (2009)]

Related papers