Academic Journal
Energy-participation quantization of Josephson circuits
| العنوان: | Energy-participation quantization of Josephson circuits |
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| المؤلفون: | Zlatko K. Minev, Zaki Leghtas, Shantanu O. Mundhada, Lysander Christakis, Ioan M. Pop, Michel H. Devoret |
| المصدر: | npj Quantum Information, Vol 7, Iss 1, Pp 1-11 (2021) |
| بيانات النشر: | Nature Portfolio, 2021. |
| سنة النشر: | 2021 |
| المجموعة: | LCC:Physics LCC:Electronic computers. Computer science |
| مصطلحات موضوعية: | Physics, QC1-999, Electronic computers. Computer science, QA75.5-76.95 |
| الوصف: | Abstract Superconducting microwave circuits incorporating nonlinear devices, such as Josephson junctions, are a leading platform for emerging quantum technologies. Increasing circuit complexity further requires efficient methods for the calculation and optimization of the spectrum, nonlinear interactions, and dissipation in multi-mode distributed quantum circuits. Here we present a method based on the energy-participation ratio (EPR) of a dissipative or nonlinear element in an electromagnetic mode. The EPR, a number between zero and one, quantifies how much of the mode energy is stored in each element. The EPRs obey universal constraints and are calculated from one electromagnetic-eigenmode simulation. They lead directly to the system quantum Hamiltonian and dissipative parameters. The method provides an intuitive and simple-to-use tool to quantize multi-junction circuits. We experimentally tested this method on a variety of Josephson circuits and demonstrated agreement within several percents for nonlinear couplings and modal Hamiltonian parameters, spanning five orders of magnitude in energy, across a dozen samples. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2056-6387 78333946 |
| Relation: | https://doaj.org/toc/2056-6387 |
| DOI: | 10.1038/s41534-021-00461-8 |
| URL الوصول: | https://doaj.org/article/7b2d97b2b478467f95c4b18d78333946 |
| رقم الانضمام: | edsdoj.7b2d97b2b478467f95c4b18d78333946 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 20566387 78333946 |
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| DOI: | 10.1038/s41534-021-00461-8 |