A Lumped Array Josephson Pulse Quantizer for Quantum-Based Arbitrary Waveform Synthesizers

Schubert, M.; Wende, G.; May, T.; Meyer, H.‐G.

doi:10.1109/cpem.2004.305512

Cited by 4 publications

(1 citation statement)

References 7 publications

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“…The number of junctions could be doubled by integrating them into a coplanar stripline [7]. The number of junctions could be further increased by splitting the coplanar stripline into parallel arms, as suggested by M. Schubert et al [18], and additionally using stacked junctions [19]. It would be possible to arrange more than 15 000 junctions in such a lumped array realized in coplanar stripline design with 4 parallel arms and consisting of 2 junctions stacks; using pulses with 5 GHz repetition frequency, output voltages of 150 mV could be generated.…”

Section: Characterization and Measurementsmentioning

confidence: 96%

SINIS Junction Series Arrays for the Josephson Arbitrary Waveform Synthesizer

Kohlmann

Müller

Behr

et al. 2005

IEEE Trans. Appl. Supercond.

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The Josephson arbitrary waveform synthesizer (JAWS) is based on Josephson junctions operated by short pulses. We describe the development of SINIS Josephson series arrays for applications in this JAWS that were performed within the framework of the EU-funded JAWS project. Index Terms-Josephson arbitrary waveform synthesizer, Josephson junction series array, Josephson voltage standard, SINIS Josephson junctions.

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Section: Characterization and Measurementsmentioning

confidence: 96%

SINIS Junction Series Arrays for the Josephson Arbitrary Waveform Synthesizer

Kohlmann

Müller

Behr

et al. 2005

IEEE Trans. Appl. Supercond.

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SNS Josephson Junction Series Arrays for the Josephson Arbitrary Waveform Synthesizer

Kieler

Kohlmann

Behr

et al. 2007

IEEE Trans. Appl. Supercond.

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The Josephson Arbitrary Waveform Synthesizer (JAWS) allows AC voltages to be generated with fundamental accuracy. Lumped arrays of Superconductor/Normal conductor/Superconductor (SNS) Josephson junctions were developed and investigated for this application. Combining electron-beam lithography and chemical-mechanical polishing, series arrays of sub-micrometer SNS junctions consisting of Nb/HfTi/Nb were fabricated. The junction size varied from 0.04 m 2 to 4 m 2 in series arrays up to 2560 junctions in different microwave designs.Stable Shapiro steps are generated in a frequency range from 5 GHz to 20 GHz using continuous microwave irradiation. Using a simple pulse pattern at different pulse repetition frequencies, the arrays show current-voltage characteristics with flat Shapiro steps. Sinusoidal AC voltages were synthesized using a commercial pulse pattern generator. Peak-to-zero voltages of some mV for frequencies below 1 kHz were achieved. Higher harmonics were measured to be more than 80 dB below the fundamental tone. The behavior of the arrays was investigated in more detail by measuring the amplitude-frequency spectra.Index Terms-AC Josephson voltage standard, Josephson arbitrary waveform synthesizer, Josephson arrays, SNS junction.

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Fabrication of Voltage Standard Circuits Utilizing a Serial–Parallel Power Divider

Yamamori

Kohjiro

2016

IEEE Trans. Appl. Supercond.

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A Lumped Array Josephson Pulse Quantizer for Quantum-Based Arbitrary Waveform Synthesizers

Cited by 4 publications

References 7 publications

SINIS Junction Series Arrays for the Josephson Arbitrary Waveform Synthesizer

SINIS Junction Series Arrays for the Josephson Arbitrary Waveform Synthesizer

SNS Josephson Junction Series Arrays for the Josephson Arbitrary Waveform Synthesizer

Fabrication of Voltage Standard Circuits Utilizing a Serial–Parallel Power Divider

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