Nonmonotonous temperature dependence of Shapiro steps in YBCO grain boundary junctions

Revin, L. S.; Masterov, D. V.; Парафин, А. Е.; Павлов, С. А.; Pankratov, A. L.

doi:10.3762/bjnano.12.95

Cited by 4 publications

(5 citation statements)

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“…Our current flux qubit implementation requires operating at liquid He temperatures [19,20]. However, there are also JJs that operate at N 2 temperatures, promising system cooling costs that are 2 to 3 orders of magnitude lower [35][36][37][38].…”

Section: Discussionmentioning

confidence: 99%

“…Here, we ensure fair comparisons between different parameter settings by fixing a relationship between the potential's energy scale and that of thermal fluctuations. This resulted in temperatures from 400-1400 mK, though it is possible to create superconducting circuits at much higher temperatures [35][36][37][38] using alternative materials.…”

Section: Computational Fidelitymentioning

confidence: 99%

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Gigahertz Sub-Landauer Momentum Computing

Crutchfield

2023

Phys. Rev. Applied

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We introduce a fast and highly efficient physically realizable bit swap. Employing readily available and scalable Josephson junction microtechnology, the design implements the recently introduced paradigm of momentum computing. Its nanosecond speeds and sub-Landauer thermodynamic efficiency arise from dynamically storing memory in momentum degrees of freedom. As such, during the swap, the microstate distribution is never near equilibrium and the memory-state dynamics fall far outside of stochastic thermodynamics that assumes detailed-balanced Markovian dynamics. The device implements a bit-swap operation-a fundamental operation necessary to build reversible universal computing. Extensive, physically calibrated simulations demonstrate that device performance is robust and that momentum computing can support thermodynamically efficient, high-speed, large-scale general-purpose computing that circumvents Landauer's bound.

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Section: Discussionmentioning

confidence: 99%

Section: Computational Fidelitymentioning

confidence: 99%

Gigahertz Sub-Landauer Momentum Computing

Crutchfield

2023

Phys. Rev. Applied

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show abstract

“…Our current flux qubit implementation requires operating at liquid He temperatures [19,20]. However, there are also JJs that operate at N 2 temperatures, promising cooling costs that would be 2 to 3 orders of magnitude lower [35][36][37][38].…”

Section: Discussionmentioning

confidence: 99%

Gigahertz Sub-Landauer Momentum Computing

J.¹,

Crutchfield²

2022

Preprint

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We introduce a fast and highly-efficient physically-realizable bit swap. Employing readily available and scalable Josephson junction microtechnology, the design implements the recently introduced paradigm of momentum computing. Its nanosecond speeds and sub-Landauer thermodynamic efficiency arise from dynamically storing memory in momentum degrees of freedom. As such, during the swap, the microstate distribution is never near equilibrium and the memory-state dynamics fall far outside of stochastic thermodynamics that assumes detailed-balanced Markovian dynamics. The device implements a bit-swap operation-a fundamental operation necessary to build reversible universal computing. Extensive, physically-calibrated simulations demonstrate that device performance is robust and that momentum computing can support thermodynamically-efficient, high-speed, large-scale general-purpose computing.

show abstract

“…• Based on Josephson junctions with frequencies of 72-265 GHz using the Josephson grain boundary junction fabricated in YBaCuO films [17] and broad-band detectors based on YBaCuO Josephson junctions fabricated on ZrYO bicrystals with a very high responsivity at 77 K (up to 9 kV/W), low noise equivalent power (NEP) of 3 × 10 −13 W/Hz (1/2) , and with a wide power dynamic range equal to 1 × 10 6 [18]. • Integrating an aluminum Josephson junction, with a size of a few micrometers, operating as a single photon counter in the microwave frequency range, switching from the superconducting to the resistive state due to absorption of a 10 GHz external signal [19].…”

mentioning

confidence: 99%

“…Based on Josephson junctions with frequencies of 72–265 GHz using the Josephson grain boundary junction fabricated in YBaCuO films [ 17 ] and broad-band detectors based on YBaCuO Josephson junctions fabricated on ZrYO bicrystals with a very high responsivity at 77 K (up to 9 kV/W), low noise equivalent power (NEP) of 3 × 10 −13 W/Hz (1/2) , and with a wide power dynamic range equal to 1 × 10 6 [ 18 ].…”

mentioning

confidence: 99%