Dephasing-assisted diffusive dynamics in superconducting quantum circuits
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arXiv
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866909845288910848 |
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| author | Liang, Yongqi Xie, Changrong Guo, Zechen Huang, Peisheng Huang, Wenhui Liu, Yiting Qiu, Jiawei Sun, Xuandong Wang, Zilin Yang, Xiaohan Zhang, Jiawei Zhang, Jiajian Zhang, Libo Chu, Ji Guo, Weijie Jiang, Ji Linpeng, Xiayu Liu, Song Niu, Jingjing Zhou, Yuxuan Zhong, Youpeng Ren, Wenhui Tao, Ziyu Yu, Dapeng |
| author_facet | Liang, Yongqi Xie, Changrong Guo, Zechen Huang, Peisheng Huang, Wenhui Liu, Yiting Qiu, Jiawei Sun, Xuandong Wang, Zilin Yang, Xiaohan Zhang, Jiawei Zhang, Jiajian Zhang, Libo Chu, Ji Guo, Weijie Jiang, Ji Linpeng, Xiayu Liu, Song Niu, Jingjing Zhou, Yuxuan Zhong, Youpeng Ren, Wenhui Tao, Ziyu Yu, Dapeng |
| contents | Random fluctuations caused by environmental noise can lead to decoherence in quantum systems. Exploring and controlling such dissipative processes is both fundamentally intriguing and essential for harnessing quantum systems to gain practical advantages and deeper insights. In this work, we first demonstrate the diffusive dynamics assisted by controlled dephasing noise in superconducting quantum circuits, contrasting with coherent evolution. We show that dephasing can give distinct dynamical behavior in a superconducting qubit array with quasiperiodic order. Furthermore, by preparing different excitation distributions in the qubit array, we observe that a more localized initial state relaxes to a uniformly distributed mixed state faster with dephasing noise, illustrating another counterintuitive phenomenon called Mpemba-effect-like quantum dynamics, i.e., a far-from-equilibrium state can relax toward the equilibrium faster. These results deepen our understanding of diffusive dynamics at the microscopic level, and demonstrate controlled dissipative processes as a valuable tool for investigating Markovian open quantum systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_15571 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Dephasing-assisted diffusive dynamics in superconducting quantum circuits Liang, Yongqi Xie, Changrong Guo, Zechen Huang, Peisheng Huang, Wenhui Liu, Yiting Qiu, Jiawei Sun, Xuandong Wang, Zilin Yang, Xiaohan Zhang, Jiawei Zhang, Jiajian Zhang, Libo Chu, Ji Guo, Weijie Jiang, Ji Linpeng, Xiayu Liu, Song Niu, Jingjing Zhou, Yuxuan Zhong, Youpeng Ren, Wenhui Tao, Ziyu Yu, Dapeng Quantum Physics Random fluctuations caused by environmental noise can lead to decoherence in quantum systems. Exploring and controlling such dissipative processes is both fundamentally intriguing and essential for harnessing quantum systems to gain practical advantages and deeper insights. In this work, we first demonstrate the diffusive dynamics assisted by controlled dephasing noise in superconducting quantum circuits, contrasting with coherent evolution. We show that dephasing can give distinct dynamical behavior in a superconducting qubit array with quasiperiodic order. Furthermore, by preparing different excitation distributions in the qubit array, we observe that a more localized initial state relaxes to a uniformly distributed mixed state faster with dephasing noise, illustrating another counterintuitive phenomenon called Mpemba-effect-like quantum dynamics, i.e., a far-from-equilibrium state can relax toward the equilibrium faster. These results deepen our understanding of diffusive dynamics at the microscopic level, and demonstrate controlled dissipative processes as a valuable tool for investigating Markovian open quantum systems. |
| title | Dephasing-assisted diffusive dynamics in superconducting quantum circuits |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2411.15571 |