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Mitigation of frequ...
Mitigation of frequency collisions in superconducting quantum processors
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- Osman, Amr, 1993 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Fernández-Pendás, Jorge, 1992 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Warren, Christopher, 1992 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Kosen, Sandoko, 1991 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Scigliuzzo, Marco (author)
- Ecole Polytechnique Federale de Lausanne (EPFL),Swiss Federal Institute of Technology in Lausanne (EPFL)
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- Frisk Kockum, Anton, 1987 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Tancredi, Giovanna, 1981 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Fadavi Roudsari, Anita, 1978 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Bylander, Jonas, 1978 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2023
- 2023
- English.
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In: Physical Review Research. - 2643-1564. ; 5:4
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https://doi.org/10.1...
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Abstract
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- The reproducibility of qubit parameters is a challenge for scaling up superconducting quantum processors. Signal cross talk imposes constraints on the frequency separation between neighboring qubits. The frequency uncertainty of transmon qubits arising from the fabrication process is attributed to deviations in the Josephson junction area, tunnel barrier thickness, and the qubit shunt capacitor. We decrease the sensitivity to these variations by fabricating larger Josephson junctions and reduce the wafer-level standard deviation in resistance down to 2%. We characterize 32 identical transmon qubits and demonstrate the reproducibility of the qubit frequencies with a 40 MHz standard deviation (i.e., 1%) with qubit quality factors exceeding 2 million. We perform two-level-system (TLS) spectroscopy and observe no significant increase in the number of TLSs causing qubit relaxation. We further show by simulation that for our parametric-gate architecture, and accounting only for errors caused by the uncertainty of the qubit frequency, we can scale up to 100 qubits with an average of only three collisions between quantum-gate transition frequencies, assuming 2% cross talk and 99.9% target gate fidelity.
Subject headings
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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Osman, Amr, 1993
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Fernández-Pendás ...
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Warren, Christop ...
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Kosen, Sandoko, ...
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Scigliuzzo, Marc ...
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Frisk Kockum, An ...
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show more...
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Tancredi, Giovan ...
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Fadavi Roudsari, ...
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Bylander, Jonas, ...
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Other Physics To ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Condensed Matter ...
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Physical Review ...
- By the university
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Chalmers University of Technology