Time Domain Design of a Josephson Parametric Amplifier and Comparison with Input Output Theory
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| Main Authors: | , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866909753300484096 |
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| author | Küçükyılmaz, Emre Ünlü, Mehmet Bozbey, Ali |
| author_facet | Küçükyılmaz, Emre Ünlü, Mehmet Bozbey, Ali |
| contents | Quantum-limited amplifiers, such as Josephson Traveling Wave Parametric Amplifiers (JTWPAs) and Josephson Parametric Amplifiers (JPAs), are essential components in quantum computers. They amplify low-power microwave signals from qubits at the 10 mK stage before further amplification at the 4 K stage using HEMT amplifiers. In JPAs, parametric amplification is based on the nonlinear properties of Josephson Junctions. While JPAs are typically designed and analyzed using input-output theory based on quantum physics, we propose an alternative approach based on an equivalent circuit model of JPAs, implemented using open-source Josephson circuit simulators. We compare the results with those obtained from input-output theory. This method enables the use of circuit optimizers for various objective functions and significantly reduces design time compared to quantum theory-based approaches. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_18396 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Time Domain Design of a Josephson Parametric Amplifier and Comparison with Input Output Theory Küçükyılmaz, Emre Ünlü, Mehmet Bozbey, Ali Quantum Physics Applied Physics Quantum-limited amplifiers, such as Josephson Traveling Wave Parametric Amplifiers (JTWPAs) and Josephson Parametric Amplifiers (JPAs), are essential components in quantum computers. They amplify low-power microwave signals from qubits at the 10 mK stage before further amplification at the 4 K stage using HEMT amplifiers. In JPAs, parametric amplification is based on the nonlinear properties of Josephson Junctions. While JPAs are typically designed and analyzed using input-output theory based on quantum physics, we propose an alternative approach based on an equivalent circuit model of JPAs, implemented using open-source Josephson circuit simulators. We compare the results with those obtained from input-output theory. This method enables the use of circuit optimizers for various objective functions and significantly reduces design time compared to quantum theory-based approaches. |
| title | Time Domain Design of a Josephson Parametric Amplifier and Comparison with Input Output Theory |
| topic | Quantum Physics Applied Physics |
| url | https://arxiv.org/abs/2508.18396 |