Effects of Spread in Critical Currents for Series- and Parallel-Coupled Arrays of SQUIDs and Bi-SQUIDs

Berggren, Susan; Escobar, Anna Leese de

doi:10.1109/tasc.2014.2359375

Cited by 18 publications

(10 citation statements)

References 10 publications

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“…Modelling reported previously [29] for N p =50 1D parallel arrays with no spread in junction parameters showed the SQIF anti-peak minimum at zero voltage. Analytical calculations of series SQIF arrays with N s =20 and 2000 junctions that include finite inductance similarly show the anti-peak minimum at zero voltage [12].…”

Section: Theoretical Modelling Results Of 1d Parallel Squid and Sqif ...supporting

confidence: 57%

Quantum interference effects in 1D parallel high-T _c SQUID arrays with finite inductance

Mitchell

Müller

Purches

et al. 2019

Supercond. Sci. Technol.

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The quantum interference effects of one-dimensional (1D) parallel arrays of high-temperature superconducting (HTS) SQUIDs were investigated experimentally and theoretically via the voltagemagnetic field responses for 4-81 Josephson junctions. The sensitivity of the arrays generally decreased as the number of junctions (and SQUIDs) in parallel increased, contrary to the predictions of models in the low (zero) inductance limit. A full theoretical description was developed to describe 1D parallel HTS SQUID arrays with finite inductances in an applied magnetic field, by extending the model for a single DC SQUID to multiple loops in parallel and including the flux generated by currents circulating through all loops in the array. Calculations were extended from SQUID arrays with equal loop areas to arrays with a distribution of loop areas, otherwise known as superconducting quantum interference filters. The model uses parameters relevant to HTS arrays, including typical variations (up to 30%) in HTS Josephson junction parameters, such as critical current and normal resistance. The effect of the location of the current biasing leads was also explored through the calculations. This model shows good agreement with experimentally measured 1D arrays of different lengths and highlights the importance of the geometry of the current biasing leads to the arrays when optimizing the array response.

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Section: Theoretical Modelling Results Of 1d Parallel Squid and Sqif ...supporting

confidence: 57%

Quantum interference effects in 1D parallel high-T _c SQUID arrays with finite inductance

Mitchell

Müller

Purches

et al. 2019

Supercond. Sci. Technol.

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“…The combination of this property with the high linearity response of bi-SQUIDs seems very promising and has therefore attracted great research interest in developing and implementing one-and two-dimensional bi-SQUID SQIFs. Numerical investigation of array structures [35][36][37][38] showed that a Gaussian law of the cell loop area distribution is the most preferable for designing bi-SQUID SQIFs. The results achieved in experimental realizations and studies of both SQIF-like and regular arrays of bi-SQUIDs are considered below.…”

Section: Arrays Of Bi-squidsmentioning

confidence: 99%

“…As shown in [35,36,56], the asymmetry impacts on the voltage response form and at g ∼ 10% reduces the attainable linearity from 90-100 dB down to 70 dB [56]. However, for the Nb process, this impact may be neglected since the spread in critical currents within a chip is typically much less.…”

Section: Thermal Noise and Asymmetry Impactmentioning

confidence: 99%

Bi-SQUID: design for applications

Kornev

Kolotinskiy

Mukhanov

2020

Supercond. Sci. Technol.

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A review of the theory of bi-SQUIDs and the experimental studies of bi-SQUID-based devices is presented. The reported output voltage linearity of the fabricated devices ( ∼ 40 to 45 dB) is much higher than that observed for dc SQUIDs ( ∼ 20 dB). Recent numerical simulation evidence indicates that the linearity can be further improved to at least 60 to 70 dB. Results from a wide, multi-parameter optimization analysis are considered in the form of parameter domains for the voltage-response linearity. Thermal–noise influence, load impact and interfacing requirements are examined. Potential applications of the devices are discussed.

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“…One-dimensional parallel SQUID and SQIF arrays have been previously theoretically studied at T = 0K 9,12,13 and experimentally investigated at high temperatures (T = 77K) 9 . Recently, Müller and Mitchell 14 introduced a theoretical model for 1D parallel HTS SQUID arrays that includes thermal noise and fluxoid focusing.…”

Section: Introductionmentioning

confidence: 99%

Modelling the transfer function of two-dimensional SQUID and SQIF arrays with thermal noise

Labarias,

Muller,

Mitchell

2021

Preprint

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Effects of Spread in Critical Currents for Series- and Parallel-Coupled Arrays of SQUIDs and Bi-SQUIDs

Cited by 18 publications

References 10 publications

Quantum interference effects in 1D parallel high-T _c SQUID arrays with finite inductance

Quantum interference effects in 1D parallel high-T _c SQUID arrays with finite inductance

Bi-SQUID: design for applications

Modelling the transfer function of two-dimensional SQUID and SQIF arrays with thermal noise

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Effects of Spread in Critical Currents for Series- and Parallel-Coupled Arrays of SQUIDs and Bi-SQUIDs

Cited by 18 publications

References 10 publications

Quantum interference effects in 1D parallel high-T c SQUID arrays with finite inductance

Quantum interference effects in 1D parallel high-T c SQUID arrays with finite inductance

Bi-SQUID: design for applications

Modelling the transfer function of two-dimensional SQUID and SQIF arrays with thermal noise

Contact Info

Product

Resources

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Quantum interference effects in 1D parallel high-T _c SQUID arrays with finite inductance

Quantum interference effects in 1D parallel high-T _c SQUID arrays with finite inductance