Characterizing and optimizing qubit coherence based on SQUID geometry
| العنوان: | Characterizing and optimizing qubit coherence based on SQUID geometry |
|---|---|
| المؤلفون: | William D. Oliver, Morten Kjaergaard, Tim Menke, Cyrus F. Hirjibehedin, Antti Vepsäläinen, David Kim, Jonilyn Yoder, Leon Ding, Jochen Braumüller, Alexander Melville, Bethany Niedzielski, Youngkyu Sung, Simon Gustavsson, Roni Winik, Terry P. Orlando |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Physics, Superconductivity, Flux qubit, Quantum Physics, Quantum decoherence, Condensed Matter - Mesoscale and Nanoscale Physics, FOS: Physical sciences, General Physics and Astronomy, Flux, Geometry, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Noise (electronics), law.invention, SQUID, law, Condensed Matter::Superconductivity, Qubit, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), 0103 physical sciences, Quantum Physics (quant-ph), 010306 general physics, 0210 nano-technology, Coherence (physics) |
| الوصف: | The dominant source of decoherence in contemporary frequency-tunable superconducting qubits is 1/$f$ flux noise. To understand its origin and find ways to minimize its impact, we systematically study flux noise amplitudes in more than 50 flux qubits with varied SQUID geometry parameters and compare our results to a microscopic model of magnetic spin defects located at the interfaces surrounding the SQUID loops. Our data are in agreement with an extension of the previously proposed model, based on numerical simulations of the current distribution in the investigated SQUIDs. Our results and detailed model provide a guide for minimizing the flux noise susceptibility in future circuits. 14 pages, 6 figures |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::38be4fc32c630b4d0edd87b33b95463b http://arxiv.org/abs/2002.09372 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....38be4fc32c630b4d0edd87b33b95463b |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |