2022
article
OpenAlex
Akim A. Babenko, Nathan E. Flowers-Jacobs, Gregor Lasser, Justus A. Brevik et autres
We present the design and characterization of a broadband RF Josephson arbitrary waveform synthesizer (RF-JAWS) with a series array of 4500 Josephson junctions (JJs) and integrated low-pass/high-pass five-pole superconducting diplexers. The integrated diplexers enable broadband filtering of the feedthrough signal components in …
us
(code pays fourni par la source)
2022
conference-paper
OpenAlex
Akim A. Babenko, Gregor Lasser, Nathan E. Flowers-Jacobs, Justus A. Brevik et autres
We demonstrate a decade-passband superconducting diplexer operating from dc to 27 GHz, integrated in a niobium, Josephson junction (JJ) compatible process. Both low-and high-pass branches of the diplexer are singly-terminated 5-pole Butterworth filters with a 2.5 GHz cutoff. Several diplexer test circuits …
us
(code pays fourni par la source)
2022
article
OpenAlex
Justus A. Brevik, Dahyeon Lee, Anna E. Fox, Yiwei Peng et autres
An array of Josephson junctions (JJs) was driven with photonically generated current pulses to synthesize a high-fidelity 1 kHz bipolar voltage waveform with a quantum-based amplitude that can be directly related to fundamental constants. A photodiode capable of producing high average photocurrent …
us
(code pays fourni par la source)
2021
article
OpenAlex
Akim A. Babenko, Nathan E. Flowers-Jacobs, Gregor Lasser, Justus A. Brevik et autres
We demonstrate a tenfold increase in the amplitude of microwave-frequency waveforms generated by a quantum-defined superconducting voltage source, with an open-circuit signal of 17.56 mV rms at 1.005 GHz. The voltage source is an RF Josephson arbitrary waveform synthesizer (RF-JAWS) that utilizes …
us
(code pays fourni par la source)
2021
article
OpenAlex
Alírio Boaventura, Justus A. Brevik, Dylan F. Williams, Nathan E. Flowers-Jacobs et autres
We are developing a new instrument, the RF Josephson arbitrary waveform synthesizer (RF-JAWS), for communications metrology and quantum information applications. An important aspect of the RF-JAWS design is the accurate and traceable characterization of its superconducting devices. In this article, we present …
us
(code pays fourni par la source)
2020
conference-paper
OpenAlex
Justus A. Brevik, Alírio Boaventura, Manuel Castellanos-Beltran, Christine A. Donnelly et autres
We performed a preliminary calibrated measurement of the output power of a Josephson arbitrary waveform synthesizer up to 1 GHz. We present the results and measurement procedure for generating quantum-based signals using an array of Josephson junctions operating at cryogenic temperature and …
us
(code pays fourni par la source)
2020
conference-paper
OpenAlex
Alírio Boaventura, Justus A. Brevik, Dylan F. Williams, Anna E. Fox et autres
We report on the calibration of quantum-based radio frequency waveforms generated by a Josephson arbitrary waveform synthesizer system. We measure these waveforms using a vector network analyzer and calibrate them at 4 K using a custom-designed cryogenic on-wafer multi-line thru-reflect-line calibration kit …
us
(code pays fourni par la source)
2020
conference-paper
OpenAlex
Justus A. Brevik, Alírio Boaventura, Akim A. Babenko, Manuel Castellanos-Beltran et autres
We performed a preliminary calibrated measurement of the output power of a Josephson arbitrary waveform synthesizer up to 1 GHz. We present the results and measurement procedure for generating quantum-based signals using an array of Josephson junctions operating at cryogenic temperature and …
us
(code pays fourni par la source)
2020
conference-paper
OpenAlex
Nathan E. Flowers-Jacobs, Akim A. Babenko, Anna E. Fox, Justus A. Brevik et autres
This paper describes the generation of a quantum-based rms output voltage of 1.332 V using an ac-coupled Josephson Arbitrary Waveform Synthesizer (JAWS) without any low-frequency compensation current biases, that is, in a `zero-compensation' (ZC) mode. Low-frequency bias currents result in unwanted error …
us
(code pays fourni par la source)
2020
conference-paper
OpenAlex
Akim A. Babenko, Alírio Boaventura, Nathan E. Flowers-Jacobs, Justus A. Brevik et autres
We present a new type of microwave frequency combs with a potentially calculable pulse shape. The device is an array of 1500 Josephson junctions (JJs) connected in series along a transmission line. The pulse generation is based on the nonlinearity of the …
us
(code pays fourni par la source)
Accès ouvert
2019
article
OpenAlex
Christine A. Donnelly, Nathan E. Flowers-Jacobs, Justus A. Brevik, Anna E. Fox et autres
We synthesize single- and multiple-tone waveforms at gigahertz frequencies from arrays of Josephson junctions and demonstrate their quantum-locked operation over a range of experimental input parameters. We first use a lumped-element circuit to synthesize 1 and 2 GHz single-tone waveforms with -71 …
us
(code pays fourni par la source)
Accès ouvert
2019
article
OpenAlex
Christine A. Donnelly, Justus A. Brevik, Nathan E. Flowers-Jacobs, Anna E. Fox et autres
We present time-domain electrical measurements and simulations of the quantized voltage pulses that are generated from series-connected Josephson junction (JJ) arrays. The transmission delay of the JJ array can lead to a broadening of the net output pulse, depending on the direction …
us
(code pays fourni par la source)