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The development of large-scale superconducting quantum computing requires efficient in-situ control methods that allow high-fidelity operations at millikelvin temperatures. Superconducting circuits based on Josephson junctions offer a…

A simple method has been developed for manufacturing a thin film superconducting quantum interferometer (SQI) with ultralow inductance (~10^-13 H). Current-voltage and voltage-field characteristics of the SQI are presented. The basic design…

Superconductivity · Physics 2018-09-07 S. I. Bondarenko , A. V. Krevsun , E. V. Ilichev , U. Hubner , V. P. Koverya , S. I. Link

We report a scanning superconducting quantum interference device (SQUID) microscope in a cryogen-free dilution refrigerator with a base temperature at the sample stage of at least 30 mK. The microscope is rigidly mounted to the mixing…

Mesoscale and Nanoscale Physics · Physics 2021-09-15 D. Low , G. M. Ferguson , Alexander Jarjour , Brian T. Schaefer , Maja D. Bachmann , Philip J. W. Moll , Katja C. Nowack

We develop a high speed on-chip flux measurement using a capacitively shunted SQUID as an embedded cryogenic transducer and apply this technique to the qualification of a near-term scalable printed circuit board (PCB) package for frequency…

Current state-of-the-art superconducting microwave qubits are cooled to extremely low temperatures to avoid sources of decoherence. Higher qubit operating temperatures would significantly increase the cooling power available, which is…

Quantum Physics · Physics 2024-08-19 Alexander Anferov , Shannon P. Harvey , Fanghui Wan , Jonathan Simon , David I. Schuster

We report development and microwave characterization of rf SQUID (Superconducting QUantum Interference Device) qubits, consisting of an aluminium-based Josephson junction embedded in a superconducting loop patterned from a thin film of TiN…

Mesoscale and Nanoscale Physics · Physics 2017-09-29 J. T. Peltonen , P. C. J. J. Coumou , Z. H. Peng , T. M. Klapwijk , J. S. Tsai , O. V. Astafiev

Adiabatic quantum-flux-parametron (AQFP) circuits can operate with extremely small energy dissipation (~1 zJ per junction at 5 GHz) and high sensitivity (~1 {\mu}A) owing to adiabatic switching. Thus, AQFP logic is suitable to use as…

Applied Physics · Physics 2021-02-25 Naoki Takeuchi , Taiki Yamae , Hideo Suzuki , Nobuyuki Yoshikawa

Nanoscale superconducting quantum interference devices (SQUIDs) are fabricated in-situ from a single Bi$_{0.26}$Sb$_{1.74}$Te$_{3}$ nanoribbon that is defined using selective-area growth and contacted with superconducting Nb electrodes via…

Difficulties in obtaining high-performance p-type transistors and gate insulator charge-trapping effects present two major challenges for III-V complementary metal-oxide semiconductor (CMOS) electronics. We report a p-GaAs nanowire…

Mesoscale and Nanoscale Physics · Physics 2018-09-28 A. R. Ullah , F. Meyer , J. G. Gluschke , S. Naureen , P. Caroff , P. Krogstrup , J. Nygard , A. P. Micolich

We describe here the first experimental realization of a heat interferometer, thermal counterpart of the well-known superconducting quantum interference device (SQUID). These findings demonstrate, on the first place, the existence of…

Superconductivity · Physics 2014-05-09 M. J. Martínez-Pérez , P. Solinas , F. Giazotto

Superconducting high kinetic inductance elements constitute a valuable resource for quantum circuit design and millimeter-wave detection. Granular aluminum (GrAl) in the superconducting regime is a particularly interesting material since it…

We present a microwave quantum refrigeration principle based on the Josephson effect. When a superconducting quantum interference device (SQUID) is pierced by a time-dependent magnetic flux, it induces changes in the macroscopic quantum…

Superconductivity · Physics 2016-07-05 Paolo Solinas , Riccardo Bosisio , Francesco Giazotto

Planar Josephson junctions (JJs) based on InSb nanoflags have recently emerged as an intriguing platform in superconducting electronics. This letter presents the fabrication and investigation of superconducting quantum interference devices…

We report on the development of nearly quantum limited SQUIDs with miniature pickup loop dimensions. The implemented high quality and low capacitance cross-type Nb/AlOx/Nb Josephson junctions offer large $I_CR_N$-products and therefore…

Superconductivity · Physics 2017-05-18 M. Schmelz , V. Zakosarenko , T. Schönau , S. Anders , S. Linzen , R. Stolz , H. -G. Meyer

We present a single-electron device for the manipulation of charge states via quantum interference in nanostructured electrodes. Via self-inductance effects, we induce two independent magnetic fluxes in the electrodes and we demonstrate…

Superconductivity · Physics 2022-05-17 Emanuele Enrico , Luca Croin , Elia Strambini , Francesco Giazotto

We use a scanning superconducting quantum interference device (SQUID) to image the magnetic flux produced by a superconducting device designed for quantum computing. The nanometer-scale SQUID-on-tip probe reveals the flow of superconducting…

Superconductivity · Physics 2022-09-16 E. Marchiori , L. Ceccarelli , N. Rossi , G. Romagnoli , J. Herrmann , J. -C. Besse , S. Krinner , A. Wallraff , M. Poggio

We present radio-frequency thermometry based on a tunnel junction between a superconductor and proximitized normal metal. It allows operation in a wide range of biasing conditions. We demonstrate that the standard finite-bias quasiparticle…

Mesoscale and Nanoscale Physics · Physics 2018-11-28 Bayan Karimi , Jukka P. Pekola

Engineering artificial systems by twisting and stacking van der Waals materials has proven to be an excellent platform for exploring emergent quantum phenomena that can be significantly different from the constituents. Recent advances in…

The magnetic sensing at nanoscale level is a promising and interesting research topic of nanoscience. Indeed, magnetic imaging is a powerful tool for probing biological, chemical and physical systems. The study of small spin cluster, like…

Superconductivity · Physics 2016-01-12 Carmine Granata , Antonio Vettoliere

The scanning superconducting quantum interference device (SQUID) fabricated on the tip of a sharp quartz pipette (SQUID-on-tip) has emerged as a versatile tool for nanoscale imaging of magnetic, thermal, and transport properties of…

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