تقرير
Surrogate model solver for impurity-induced superconducting subgap states
| العنوان: | Surrogate model solver for impurity-induced superconducting subgap states |
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| المؤلفون: | Baran, Virgil V., Frost, Emil J. P., Paaske, Jens |
| المصدر: | Phys. Rev. B 108, L220506 (2023) |
| سنة النشر: | 2023 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity, Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Strongly Correlated Electrons |
| الوصف: | A simple impurity solver is shown to capture the impurity-induced superconducting subgap states in quantitative agreement with the numerical renormalization group and quantum Monte-Carlo simulations. The solver is based on the exact diagonalization of a single-impurity Anderson model with discretized superconducting reservoirs including only a small number of effective levels. Their energies and couplings to the impurity $d$-level are chosen so as to best reproduce the Matsubara frequency dependence of the hybridization function. We provide a number of critical benchmarks and demonstrate the solvers efficiency in combination with the reduced basis method [Phys. Rev. B 107, 144503 (2023)] by calculating the phase diagram for an interacting three-terminal junction. Comment: 19 pages, 20 figures; v2: new results on the phase diagram of a finite-gap interacting topological three-terminal Josephson junction |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.108.L220506 |
| URL الوصول: | http://arxiv.org/abs/2307.11646 |
| رقم الأكسشن: | edsarx.2307.11646 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.108.L220506 |
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