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Nb/ a -Si/Nb-junction Josephson arbitrary waveform synthesizers for quantum information.

التفاصيل البيبلوغرافية
العنوان: Nb/ a -Si/Nb-junction Josephson arbitrary waveform synthesizers for quantum information.
المؤلفون: Olaya D; Department of Physics at the University of Colorado, Boulder, CO; RF Technology Division of the National Institute of Standards and Technology, Boulder, CO, USA., Biesecker J; RF Technology Division of the National Institute of Standards and Technology, Boulder, CO, USA., Castellanos-Beltran M; RF Technology Division of the National Institute of Standards and Technology, Boulder, CO, USA., Sirois A; RF Technology Division of the National Institute of Standards and Technology, Boulder, CO, USA., Howe L; Department of Physics at the University of Colorado, Boulder, CO; RF Technology Division of the National Institute of Standards and Technology, Boulder, CO, USA., Dresselhaus P; RF Technology Division of the National Institute of Standards and Technology, Boulder, CO, USA., Benz S; RF Technology Division of the National Institute of Standards and Technology, Boulder, CO, USA., Hopkins P; RF Technology Division of the National Institute of Standards and Technology, Boulder, CO, USA.
المصدر: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee [IEEE Trans Appl Supercond] 2022 Aug; Vol. 33 (5).
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: Institute of Electrical and Electronics Engineers Country of Publication: United States NLM ID: 101517554 Publication Model: Print Cited Medium: Print ISSN: 1051-8223 (Print) NLM ISO Abbreviation: IEEE Trans Appl Supercond Subsets: PubMed not MEDLINE
أسماء مطبوعة: Original Publication: New York, NY : Institute of Electrical and Electronics Engineers, c1991-
مستخلص: We demonstrate Josephson arbitrary waveform synthesizers (JAWS) with increased operating temperature range for temperatures below 4 K. These JAWS synthesizers were fabricated with externally-shunted Nb/ a -Si/Nb junctions whose critical current exhibits improved temperature stability compared to the self-shunted Nb/Nb 0.15 Si 0.85 /Nb junctions typically used. Vertical stud resistors made of 230 nm of PdAu were developed to provide the milliohm shunt resistance required for junction overdamping while maintaining a small footprint suitable for high-density series arrays embedded in a coplanar waveguide. We evaluated the performance of these resistors from 3.8 K down to 20 mK. We designed, fabricated and tested a JAWS circuit with 4650 externally shunted Nb/ a -Si/Nb JJs with a critical current density ( J c ) of 0.12 mA ∕ μ m 2 and critical current ( I c ) of 3 mA. This circuit was designed to be mounted to the 3 K stage of a dilution refrigerator and used to control and calibrate a qubit mounted at the 10 mK stage. To increase the circuit density of the JAWS circuits we made arrays of two-junction vertical stacks. Current-voltage ( I - V ) curves of this JAWS circuit with stacked junctions under microwave excitation show Shapiro steps with quantum-locking ranges similar to those of JAWS circuits used for qubit control.
References: IEEE Trans Appl Supercond. 2019;30:. (PMID: 31579273)
PRX quantum. 2020 Mar;3(1):. (PMID: 36726390)
معلومات مُعتمدة: 9999-NIST United States ImNIST Intramural NIST DOC
فهرسة مساهمة: Keywords: Josephson devices; Josephson junctions; fabrication process; single flux quantum; superconducting electronics
تواريخ الأحداث: Date Created: 20230918 Latest Revision: 20230919
رمز التحديث: 20240628
مُعرف محوري في PubMed: PMC10502609
DOI: 10.1109/tasc.2023.3249141
PMID: 37720264
قاعدة البيانات: MEDLINE
الوصف
تدمد:1051-8223
DOI:10.1109/tasc.2023.3249141