تقرير
BCS surrogate models for floating superconductor-semiconductor hybrids
| العنوان: | BCS surrogate models for floating superconductor-semiconductor hybrids |
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| المؤلفون: | Baran, Virgil V., Paaske, Jens |
| المصدر: | Phys. Rev. B 109, 224501 (2024) |
| سنة النشر: | 2024 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity, Condensed Matter - Mesoscale and Nanoscale Physics |
| الوصف: | Superconductor-semiconductor hybrid devices, involving quantum dots interfaced with floating and/or grounded superconductors, have reached a level of complexity which calls for the development of versatile and numerically efficient modelling tools. Here, we propose an extension of the surrogate model solver for sub-gap states [Phys. Rev. B 108, L220506 (2023)], which is able to handle floating superconducting islands with finite charging energy. Upon eliminating all finite-size effects of the computationally demanding Richardson model approach, we achieve a more efficient way of calculating the sub-gap spectra and related observables without compromising their accuracy. We provide a number of benchmarks between the two approaches and showcase the versatility of the extended surrogate model solver by studying the stability of spin-triplet ground states in various tunable devices. The methods introduced here set the stage for reliable microscopic simulations of complex superconducting quantum circuits across all their relevant parameter regimes. Comment: 12 pages, 12 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.109.224501 |
| URL الوصول: | http://arxiv.org/abs/2402.18357 |
| رقم الأكسشن: | edsarx.2402.18357 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.109.224501 |
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