Simple, High Saturation Power, Quantum-limited, RF SQUID Array-based Josephson Parametric Amplifiers
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arXiv
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| Autori principali: | , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866913358150631424 |
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| author | Kaufman, Ryan Liu, Chenxu Cicak, Katarina Mesits, Boris Xia, Mingkang Zhou, Chao Nowicki, Maria Aumentado, José Pekker, David Hatridge, Michael |
| author_facet | Kaufman, Ryan Liu, Chenxu Cicak, Katarina Mesits, Boris Xia, Mingkang Zhou, Chao Nowicki, Maria Aumentado, José Pekker, David Hatridge, Michael |
| contents | High-fidelity quantum non-demolition qubit measurement is critical to error correction and rapid qubit feedback in large-scale quantum computing. High-fidelity readout requires passing a short and strong pulse through the qubit's readout resonator, which is then processed by a sufficiently high bandwidth, high saturation power, and quantum-limited amplifier. We have developed a design pipeline that combines time-domain simulation of the un-truncated device Hamiltonian, fabrication constraints, and maximization of saturation power. We have realized an amplifier based on a modified NIST tri-layer Nb fabrication suite which utilizes an array of 25 radio frequency Superconducting QUantum Interference Devices (rf SQUIDs) embedded within a low-Q resonator powered by a high-power voltage pump delivered via a diplexer on the signal port. We show that, despite the intensity of the pump, the device is quantum-efficient and capable of high-fidelity measurement limited by state transitions in the transmon. We present experimental data demonstrating up to -91.2 dBm input saturation power with 20 dB gain, up to 28 MHz instantaneous bandwidth, and phase-preserving qubit measurements with 62% quantum efficiency. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_19435 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Simple, High Saturation Power, Quantum-limited, RF SQUID Array-based Josephson Parametric Amplifiers Kaufman, Ryan Liu, Chenxu Cicak, Katarina Mesits, Boris Xia, Mingkang Zhou, Chao Nowicki, Maria Aumentado, José Pekker, David Hatridge, Michael Quantum Physics High-fidelity quantum non-demolition qubit measurement is critical to error correction and rapid qubit feedback in large-scale quantum computing. High-fidelity readout requires passing a short and strong pulse through the qubit's readout resonator, which is then processed by a sufficiently high bandwidth, high saturation power, and quantum-limited amplifier. We have developed a design pipeline that combines time-domain simulation of the un-truncated device Hamiltonian, fabrication constraints, and maximization of saturation power. We have realized an amplifier based on a modified NIST tri-layer Nb fabrication suite which utilizes an array of 25 radio frequency Superconducting QUantum Interference Devices (rf SQUIDs) embedded within a low-Q resonator powered by a high-power voltage pump delivered via a diplexer on the signal port. We show that, despite the intensity of the pump, the device is quantum-efficient and capable of high-fidelity measurement limited by state transitions in the transmon. We present experimental data demonstrating up to -91.2 dBm input saturation power with 20 dB gain, up to 28 MHz instantaneous bandwidth, and phase-preserving qubit measurements with 62% quantum efficiency. |
| title | Simple, High Saturation Power, Quantum-limited, RF SQUID Array-based Josephson Parametric Amplifiers |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2402.19435 |