Giant-atom quantum acoustodynamics in hybrid superconducting-phononic integrated circuits
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arXiv
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| Format: | Preprint |
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2025
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| author | Xiao, Lintao Zhang, Bo Zeng, Yu Pan, Xiaoxuan Wang, Jia-Qi Hua, Ziyue Huang, Hongwei Xu, Yifang Xue, Guangming Yu, Haifeng Xu, Xin-Biao Wang, Weiting Zou, Chang-Ling Sun, Luyan |
| author_facet | Xiao, Lintao Zhang, Bo Zeng, Yu Pan, Xiaoxuan Wang, Jia-Qi Hua, Ziyue Huang, Hongwei Xu, Yifang Xue, Guangming Yu, Haifeng Xu, Xin-Biao Wang, Weiting Zou, Chang-Ling Sun, Luyan |
| contents | We demonstrate a giant atom by coupling a superconducting transmon qubit to a lithium niobate phononic waveguide at two points separated by about 600 acoustic wavelengths, with a propagation delay of 125 ns. The giant atom yields non-Markovian relaxation dynamics characterized by phonon backflow and a frequency-dependent effective decay rate varying four-fold over merely 4 MHz, corresponding to a Purcell factor exceeding 40. Exploiting this frequency-dependent dissipation, we prepare quantum superposition states with high purity. Our results establish phononic integrated circuits as a versatile platform for giant-atom physics, providing highly tunable quantum devices for advanced quantum information processing. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_16582 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Giant-atom quantum acoustodynamics in hybrid superconducting-phononic integrated circuits Xiao, Lintao Zhang, Bo Zeng, Yu Pan, Xiaoxuan Wang, Jia-Qi Hua, Ziyue Huang, Hongwei Xu, Yifang Xue, Guangming Yu, Haifeng Xu, Xin-Biao Wang, Weiting Zou, Chang-Ling Sun, Luyan Quantum Physics We demonstrate a giant atom by coupling a superconducting transmon qubit to a lithium niobate phononic waveguide at two points separated by about 600 acoustic wavelengths, with a propagation delay of 125 ns. The giant atom yields non-Markovian relaxation dynamics characterized by phonon backflow and a frequency-dependent effective decay rate varying four-fold over merely 4 MHz, corresponding to a Purcell factor exceeding 40. Exploiting this frequency-dependent dissipation, we prepare quantum superposition states with high purity. Our results establish phononic integrated circuits as a versatile platform for giant-atom physics, providing highly tunable quantum devices for advanced quantum information processing. |
| title | Giant-atom quantum acoustodynamics in hybrid superconducting-phononic integrated circuits |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2512.16582 |