Modeling Josephson traveling-wave parametric amplifiers with electromagnetic and circuit co-simulation
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866909780139835392 |
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| author | Yang, Likai Wang, Jennifer Hassan, Mohamed Awida Krantz, Philip O'Brien, Kevin P. |
| author_facet | Yang, Likai Wang, Jennifer Hassan, Mohamed Awida Krantz, Philip O'Brien, Kevin P. |
| contents | Optimizing the performance of cryogenic quantum amplifiers is a key step toward achieving high-fidelity and scalable qubit readout. In this work, we present efficient and accurate modeling of a Josephson traveling-wave parametric amplifier (JTWPA) based on electromagnetic (EM) and circuit co-simulation. In contrast to conventional simulation methods where an equivalent lumped-element circuit model of the JTWPA is required, we directly perform full EM analysis of the device to faithfully determine the linear response. The extracted S-parameters are then fed into a nonlinear harmonic balance simulator with Josephson junctions represented as circuit elements. The simulated linear and gain properties are compared with experimental results and show good agreement. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_07807 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Modeling Josephson traveling-wave parametric amplifiers with electromagnetic and circuit co-simulation Yang, Likai Wang, Jennifer Hassan, Mohamed Awida Krantz, Philip O'Brien, Kevin P. Quantum Physics Optimizing the performance of cryogenic quantum amplifiers is a key step toward achieving high-fidelity and scalable qubit readout. In this work, we present efficient and accurate modeling of a Josephson traveling-wave parametric amplifier (JTWPA) based on electromagnetic (EM) and circuit co-simulation. In contrast to conventional simulation methods where an equivalent lumped-element circuit model of the JTWPA is required, we directly perform full EM analysis of the device to faithfully determine the linear response. The extracted S-parameters are then fed into a nonlinear harmonic balance simulator with Josephson junctions represented as circuit elements. The simulated linear and gain properties are compared with experimental results and show good agreement. |
| title | Modeling Josephson traveling-wave parametric amplifiers with electromagnetic and circuit co-simulation |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2509.07807 |