Superconductivity and the environment: a Roadmap

Nishijima, Shigehiro; Eckroad, S.; Marian, Adela; Choi, Kyeongdal; Kim, Woo Seok; Terai, Motoaki; Deng, Zigang; Zheng, Jun; Wang, Jiasu; Umemoto, Katsuya; Du, Jia; Febvre, Pascal; Keenan, Shane; Mukhanov, Oleg A.; Cooley, L. D.; Foley, C. P.; Hassenzahl, W.V.; Izumi, Mitsuru

doi:10.1088/0953-2048/26/11/113001

Cited by 124 publications

(60 citation statements)

References 91 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…14, it was argued that with the progress in superconducting quantum computing, a lot of data will be processed at low temperatures, and therefore the using of mature digital RSFQ electronics 23 as an interface between quantum circuits and room temperature electronics is quite natural. The considered schemes can be easily incorporated with RSFQ circuits, since they imply single-shot measurements and can be implemented on nearly the same element basis as RSFQ cells, i.e., using discrete JTLs.…”

mentioning

confidence: 99%

Symmetrical Josephson vortex interferometer as an advanced ballistic single-shot detector

Soloviev

Klenov

Bakurskiy

et al. 2014

Applied Physics Letters

View full text Add to dashboard Cite

We consider a ballistic detector formed in an interferometer manner which operational principle relies on Josephson vortex scattering at a measurement potential. We propose an approach to symmetrize the detector scheme and explore arising advantages in the signal-to-noise ratio and in the back-action on a measured object by means of recently presented numerical and analytical methods for modeling of a soliton scattering dynamics in the presence of thermal fluctuations. The obtained characteristics for experimentally relevant parameters reveal practical applicability of the considered schemes including possibility of coupling with standard digital rapid single flux quantum circuits. V C 2014 AIP Publishing LLC. [http://dx.doi.org/10.1063/1.4902327] Ballistic detectors are widely used for mesoscopic quantum measurements.1 In these detectors, a measured system controls a transport of particles by creating a scattering potential. The detector scheme can be organized in an interferometer manner. For example, in the ballistic read-out of superconducting flux qubit, the scheme contains two equal Josephson transmission lines (JTLs), one of which is coupled to the qubit, 2 see Fig. 1(a). Fluxons propagating simultaneously along the JTLs serve as particles in this scheme. The fluxon scattering at the current dipole induced by the qubit magnetic field (see Fig. 1(b)) provides measurable time delay between the moments of arrival of the fluxons to the end of the JTLs. This single-shot, non-projective measurements 3,4 can be made nearly non-demolition by matching the measurement frequency with the frequency of coherent qubit oscillations as described in Ref. 2. Such read-out attracts interest in context of quantum computing which underwent rapid development in the last decade. 5-9A number of works were devoted to theoretical and experimental study of the detector.10-15 It appears that the main drawbacks in its operation come from relativistic effects of the fluxon dynamics. In the experiment, 13,14 the authors used single annular JTL coupled to the qubit instead of a couple, measuring deviation of the fluxon rotation frequency. The measurement results show that this deviation does not depend on the measured magnetic field orientation (the current dipole polarity). The qualitative explanation is that the relativistic fluxon characteristic size becomes much smaller than the dipole length due to Lorenz contraction. Therefore, the total contribution of the successive scatterings at the dipole poles to the frequency shift is independent on the order of the poles. Since the fluxon being inside the coupling loop induces circulating current affecting the qubit, the contraction additionally enhance the back-action. While slow fluxon is obviously preferred to gain the time response, 11,12,15 the corresponding bias current, acting as the fluxon driving force, appears to be unreasonable for the experiment. 12,13 In this work, we study two ways to overcome the discussed drawbacks and show that symmetrization of the coupling leads to signi...

show abstract

mentioning

confidence: 99%

Symmetrical Josephson vortex interferometer as an advanced ballistic single-shot detector

Soloviev

Klenov

Bakurskiy

et al. 2014

Applied Physics Letters

View full text Add to dashboard Cite

show abstract

“…One can mention broadband lownoise amplifiers (e.g., see design approaches in [4,5]) as well as broadband active electrically small antennas (ESAs) capable of providing concurrent receiving and amplification of the broadband electromagnetic signals. The SQAs are also beneficial for many applications, in which SQUIDs and SQUID arrays are being used [1,2,36].…”

Section: Resultsmentioning

confidence: 99%

From single SQUID to superconducting quantum arrays

Kornev

Kolotinskiy

Sharafiev

et al. 2017

Low Temperature Physics

View full text Add to dashboard Cite

Superconducting quantum arrays (SQAs) capable of providing highly linear voltage response to magnetic signal and high dynamic range have been suggested and developed. Base elements of the arrays, quantum cells, were devised and studied in detail. Using niobium process, SQAs with different number of the cells and prototypes of the SQA-based broadband active electrically small antennas were fabricated and tested.

show abstract

“…The Japanese rail operator announced the implementation of a new magnetic levitation train able to achieve 600km/h. They expect to have in operation this new train in 2027 [4].This line will have a 286km route with an expected time travel of 40min less than an hour compared with the same route travelled by the actual "shinkansen" or bullet trains. …”

Section: A Magnetic Levitation Trainmentioning

confidence: 99%

Superconductivity and their Applications

Roque¹,

Sousa²,

Pires³

et al. 2017

REPQJ

View full text Add to dashboard Cite

Abstract. The research in the field of superconductivity has led to the synthesis of superconducting materials with features that allow you to expand the applicability of this kind of materials. Among the superconducting materials characteristics, the critical temperature of the superconductor is framing the range and type of industrial applications that can benefit from them. Some examples of industrial applications incorporating superconducting materials stand out in this paper. Among other possibilities, the nuclear magnetic resonance, the magnetic levitation train, the transport processing of electrical energy (motors, generators, transformers and power lines) and superconducting magnetic energy storage (SMES) systems are already solutions contributing to the nowadays daily life, but more than that, are solutions that will contribute to improve the quality of life of many human beings in the near future. In addition to these solutions, in this paper are presented and discussed the pros and cons of a solution designed for the fast field cycling nuclear magnetic resonance technique that benefits of the usage of superconducting blocks.

show abstract

Superconductivity and the environment: a Roadmap

Cited by 124 publications

References 91 publications

Symmetrical Josephson vortex interferometer as an advanced ballistic single-shot detector

Symmetrical Josephson vortex interferometer as an advanced ballistic single-shot detector

From single SQUID to superconducting quantum arrays

Superconductivity and their Applications

Contact Info

Product

Resources

About